MTD ITSA Guide UK | Quarterly Tax Reporting for Small Businesses

Introduction to Making Tax Digital for Income Tax Self Assessment (MTD ITSA)

Making Tax Digital for Income Tax Self Assessment (MTD ITSA) represents a significant shift in the UK tax system, moving towards a modern, digital approach to tax reporting. Introduced by HMRC, MTD aims to make tax administration more efficient, reduce errors, and provide businesses with a clearer, more up-to-date view of their tax position. Instead of a single annual tax return, MTD ITSA requires self-employed individuals and landlords to keep digital records of their income and expenses and submit quarterly updates to HMRC using MTD-compatible software.

This phased rollout means that many small businesses and landlords will soon need to adapt their accounting practices. Understanding the timelines, requirements, and how to prepare is crucial for ensuring compliance and avoiding penalties. This comprehensive guide will walk you through every aspect of MTD ITSA, from who is affected and when, to the practical steps you need to take to transition smoothly.

What is Making Tax Digital for Income Tax Self Assessment (MTD ITSA)?

MTD ITSA is HMRC's initiative to modernise the tax system for Income Tax. It fundamentally changes the way self-employed individuals and landlords report their income and expenses to HMRC. The core principles of MTD ITSA revolve around:

Digital Record Keeping: Businesses must keep digital records of their income and expenditure using MTD-compatible software. This replaces traditional paper or manual spreadsheet systems.
Quarterly Updates: Instead of one annual tax return, businesses will need to send summary updates of their business income and expenses to HMRC every three months.
End of Period Statement (EOPS): After the final quarterly update for the tax year, an EOPS is submitted to make any accounting adjustments and claim reliefs.
Final Declaration: This is the final step, consolidating all income sources, including those not covered by MTD ITSA, to calculate the final tax liability.

The primary goal of MTD ITSA is to reduce common errors in tax returns, make it easier for businesses to get their tax right, and give HMRC a more real-time view of a taxpayer's finances. This move is expected to improve the accuracy of tax calculations, help businesses manage their tax affairs more effectively throughout the year, and ultimately lead to a more streamlined and transparent tax system for everyone involved.

HMRC believes that by digitalising the process, businesses will gain a better understanding of their financial position, allowing for more proactive tax planning and budgeting, rather than facing a large tax bill at the end of the financial year.

When Will Your Business Need to Switch to MTD ITSA? Key Thresholds and Dates

The implementation of MTD ITSA is being rolled out in phases, based on a taxpayer's gross income from their self-employment and property businesses. It's crucial for businesses and landlords to understand these thresholds and dates to ensure timely compliance.

The Phased Rollout Schedule:

Threshold	Date	Description
£50,000 or more	From 6 April 2026	Mandatory for self-employed individuals and landlords with gross income above this threshold.
£30,000 or more	From 6 April 2027	Mandatory for self-employed individuals and landlords with gross income above this threshold.
Partnerships	To be confirmed	General partnerships will join MTD ITSA at a later date, yet to be announced by HMRC.
Voluntary adoption	Currently available	Businesses and landlords below the mandatory thresholds can choose to join MTD ITSA voluntarily.

Understanding the Income Thresholds:

The thresholds of £50,000 and £30,000 refer to your gross income from all self-employment and property businesses. This is the total income before any expenses or allowances are deducted. It is important to note that if you have multiple income streams, such as a sole trader business and a property rental business, these incomes are aggregated to determine if you meet the threshold. For example, if you earn £30,000 from your freelance work and £25,000 from a rental property, your combined gross income is £55,000, meaning you would fall into the initial £50,000 threshold group and need to comply from April 2026.

What if my income fluctuates? If your income is close to a threshold, you should monitor it carefully. HMRC's guidance indicates that if your gross income exceeds the threshold in one tax year, you will generally be mandated for MTD ITSA from the start of the next tax year. If your income then falls below the threshold in a subsequent year, you may be able to opt out, but this is subject to specific conditions and should be discussed with HMRC or a tax professional.

Exemptions from MTD ITSA:

While MTD ITSA will become mandatory for many, certain individuals and businesses may be exempt. These exemptions include:

Low Income: Those whose gross income consistently remains below the £30,000 threshold.
Digital Exclusion: Individuals who are genuinely unable to engage with digital tools due to age, disability, remoteness of location, or other practical reasons, and for whom it is not reasonably practicable to use digital means. An application for exemption must be made to HMRC.
Religious Objection: Individuals whose religious beliefs are incompatible with the use of electronic communications.
Insolvency: Individuals in insolvency procedures may also be exempt.

It is important to apply for an exemption if you believe you qualify, rather than simply not complying. HMRC will review each case individually.

Partnerships and MTD ITSA:

General partnerships will be brought into MTD ITSA at a later stage. HMRC has not yet announced a specific date for this, but it is expected to follow the individual and landlord rollout. Limited Liability Partnerships (LLPs) and other corporate entities are generally subject to Corporation Tax, not Income Tax Self Assessment, and will therefore follow the MTD for Corporation Tax rules, which are also yet to be fully implemented.

For those below the mandatory thresholds, voluntary adoption of MTD ITSA is already possible. This can be a good way to familiarise yourself with the new system before it becomes compulsory, potentially offering an advantage in terms of efficiency and tax planning.

Digital Record Keeping: The Foundation of MTD ITSA

At the heart of Making Tax Digital is the requirement for digital record keeping. This means that all relevant business transactions, both income and expenses, must be recorded and stored digitally. This is a fundamental departure from traditional paper-based accounting or even basic spreadsheet management without MTD-compatible bridging software.

What Constitutes Digital Records?

Digital records are not simply scanned copies of paper receipts. They must be generated and stored within MTD-compatible software. This software must be capable of:

Recording the date, value, and category of all business transactions.
Storing details of income and expenses, including any adjustments for personal use or non-allowable items.
Linking directly to HMRC's MTD systems for submitting quarterly updates and other declarations.

Key Data Points for Digital Records:

For each transaction, your digital records should capture, at a minimum:

Date of transaction
Type of income or expense (e.g., sales, rent, stationery, travel)
Amount received or paid
Bank account or payment method used
Any specific VAT element (if VAT registered)
Adjustments for private use or non-business items

Prohibited Methods and Bridging Software:

Simply keeping paper records or using a standard spreadsheet that is not linked to MTD-compatible software will not meet the digital record-keeping requirements. If you currently use spreadsheets, you will need to either:

Migrate to a full MTD-compatible accounting software, such as AccountsOS.
Utilise "bridging software" which can take data from your spreadsheet and translate it into a format that can be submitted digitally to HMRC. This acts as a digital link between your spreadsheet and HMRC's systems.

It's important to understand that even with bridging software, the data in your spreadsheet must be digitally maintained and capable of being transferred without manual intervention at the point of submission.

Importance of Accuracy and Completeness:

Accurate and complete digital records are paramount. MTD ITSA is designed to reduce errors, and incomplete or incorrect records can lead to penalties. Regular reconciliation of bank accounts with your digital records will become a standard practice. Software like AccountsOS can automate many of these tasks, linking directly to your bank accounts to import transactions and suggesting categories, significantly reducing manual effort and potential for error.

Record Retention Rules:

Even with digital records, the requirement to keep records for a specific period remains. Generally, you must keep your business records for at least 5 years after the 31 January submission deadline of the relevant tax year. This applies to both the digital records themselves and any supporting documentation, such as invoices and receipts, even if they were originally paper-based and subsequently digitised.

Quarterly Updates: Your New Reporting Rhythm

One of the most significant changes under MTD ITSA is the requirement to submit quarterly updates of your business income and expenses. This replaces the once-a-year reporting cycle for self-assessment. These updates provide HMRC with a more frequent snapshot of your business activity.

What Needs to Be Reported Quarterly?

For each of your self-employment and property businesses, you will need to submit a summary of:

Total Income: The total gross income received during the quarter.
Total Expenses: The total of your allowable business expenses for the quarter, broken down by category.
Adjustments: Any necessary adjustments, such as for private use of assets, which can be made at this stage or later in the End of Period Statement.

It is important to remember that these are summary figures. You do not need to send individual invoices or receipts to HMRC with your quarterly updates. The detailed digital records you maintain in your MTD-compatible software will support these summaries.

Reporting Periods and Deadlines:

The quarterly reporting periods are fixed to the tax year, regardless of your business's individual accounting period. The deadlines for submitting these updates are typically one month and seven days after the end of each quarter.

Reporting Period	Deadline
6 April to 5 July	5 August
6 July to 5 October	5 November
6 October to 5 January	5 February
6 January to 5 April	5 May

Example: For the tax year 6 April 2026 to 5 April 2027:

Quarter 1 (6 April to 5 July 2026): Update due by 5 August 2026
Quarter 2 (6 July to 5 October 2026): Update due by 5 November 2026
Quarter 3 (6 October to 5 January 2027): Update due by 5 February 2027
Quarter 4 (6 January to 5 April 2027): Update due by 5 May 2027

How to Submit Quarterly Updates:

All quarterly updates must be submitted directly to HMRC through MTD-compatible software. This software will connect to HMRC's systems via an Application Programming Interface (API), ensuring a secure and digital submission. Manual submission methods will not be accepted. AccountsOS is designed to facilitate this process, automatically compiling your digital records into the required quarterly summaries and submitting them at the push of a button.

No Tax Calculation or Payment at This Stage:

Crucially, the quarterly updates are for reporting purposes only. You do not calculate or pay any Income Tax at this stage. The purpose is to provide HMRC with regular information, and for you to maintain an up-to-date view of your potential tax liability. The actual tax calculation and payment will occur later, following the End of Period Statement and Final Declaration.

Worked Example: Quarterly Update for a Sole Trader

Let's consider a freelance graphic designer, Sarah, who needs to submit her first quarterly update for the period 6 April 2026 to 5 July 2026.

Sarah's Quarterly Figures (6 April to 5 July 2026):

Category	Amount (£)
Gross Sales Income	6,500
Office Supplies	120
Software Subscriptions	80
Travel Expenses	75
Marketing & Advertising	150
Professional Development	200
Total Expenses	625

Sarah's MTD-compatible software will automatically compile these figures. She will review them, make sure all transactions are categorised correctly, and then submit the summary totals for Gross Sales Income (£6,500) and Total Expenses (£625) to HMRC by 5 August 2026. No tax is calculated or paid at this point.

Cash Basis vs Accruals Basis Accounting:

Under MTD ITSA, most small businesses and landlords will continue to use the cash basis of accounting, where income and expenses are recorded when money is actually received or paid. This is simpler and generally suitable for smaller entities. Larger businesses or those with complex financial structures may opt for the accruals basis, where income and expenses are recognised when they are earned or incurred, regardless of when the cash changes hands. Your MTD-compatible software should support your chosen accounting method.

The quarterly updates are a significant change, but by keeping up-to-date digital records, the process becomes largely automated, providing continuous visibility into your business finances.

End of Period Statement (EOPS): Finalising Your Annual Figures

After you have submitted your four quarterly updates for a tax year, the next step in the MTD ITSA process is the End of Period Statement (EOPS). The EOPS is a crucial annual declaration that allows you to apply any necessary accounting adjustments and claim reliefs that are not typically included in the simpler quarterly summaries.

Purpose of the EOPS:

The EOPS serves to reconcile your quarterly submissions with your annual accounting practices and tax rules. It is where you make adjustments for items like:

Capital Allowances: Deductions for the depreciation of assets, such as vehicles, equipment, and machinery.
Pre-trading Expenses: Costs incurred before your business started trading, which can often be claimed against profits.
Accruals and Prepayments: For businesses using accruals accounting, adjusting income and expenses to the correct accounting period.
Stock Adjustments: Valuing opening and closing stock for the year.
Private Use Adjustments: Final adjustments for any personal use of business assets or services that were not fully accounted for in quarterly updates.
Overlap Relief: If you started your business before MTD and had an accounting period that did not align with the tax year, you might have 'overlap profits' which can be relieved when your business ceases or changes its accounting period.
Reliefs and Losses: Claiming any specific tax reliefs or carrying forward/back business losses.

When is the EOPS Due?

The EOPS must be submitted by the 31 January following the end of the tax year. For example, for the tax year 2026-2027 (ending 5 April 2027), the EOPS would be due by 31 January 2028. This aligns with the traditional Self Assessment filing deadline.

Relationship between Quarterly Updates and EOPS:

The EOPS takes the aggregated figures from your four quarterly updates and then applies the necessary annual adjustments. Your MTD-compatible software will play a crucial role in compiling these figures and facilitating the adjustments. This ensures that your final taxable profit for the year is accurately calculated according to tax law.

Worked Example: Calculating Capital Allowances and Applying to EOPS

Let's continue with Sarah, the freelance graphic designer. Throughout the 2026-2027 tax year, her quarterly updates showed a total gross income of £28,000 and total allowable expenses of £2,500. In December 2026, Sarah purchased a new high-performance computer for her business costing £2,000. She wants to claim the Annual Investment Allowance (AIA) for this.

Sarah's EOPS Calculation (2026-2027 Tax Year):

Item	Amount (£)
Total Gross Income (from quarterly updates)	28,000
Total Allowable Expenses (from quarterly updates)	2,500
Provisional Profit Before Adjustments	25,500
Annual Investment Allowance (AIA) for computer	(2,000)
Other EOPS Adjustments (e.g., private use, accruals)	0
Final Taxable Profit for EOPS	23,500

Sarah's software will allow her to enter the new computer as an asset and claim the AIA. This £2,000 deduction will be applied in her EOPS, reducing her taxable profit from £25,500 to £23,500 for that business. This lower profit figure is then passed to the Final Declaration for overall tax calculation.

How EOPS Differs from the Traditional Self Assessment Tax Return:

Before MTD ITSA, all these adjustments were part of the single annual Self Assessment tax return. With MTD, the EOPS specifically deals with the adjustments related to your self-employment or property businesses. Other income sources, such as employment income, savings interest, or dividends, are then brought in at the Final Declaration stage. This modular approach aims to streamline the process, making it clearer how each income source contributes to your overall tax liability.

The Final Declaration: Bringing It All Together

The Final Declaration is the last step in the MTD ITSA process for a given tax year. It is analogous to the current Self Assessment tax return, but it integrates the information already provided through your quarterly updates and End of Period Statements.

What is the Final Declaration?

The Final Declaration is the comprehensive statement that consolidates all your income sources, not just those covered by MTD ITSA. This includes:

The final taxable profits from your self-employment and property businesses (derived from your EOPS).
Employment income (P60 data).
Bank interest and savings income.
Dividend income.
Capital Gains.
Any other taxable income.
Personal allowances, reliefs, and any other relevant deductions.

Your MTD-compatible software, or bridging software if used, will collate this information and allow you to submit the Final Declaration to HMRC. This declaration will then calculate your total Income Tax and National Insurance Contributions (NICs) for the year.

Payment Deadline:

The deadline for submitting your Final Declaration and paying any outstanding tax remains the same as the current Self Assessment system: 31 January following the end of the tax year. For example, for the tax year 2026-2027, the Final Declaration and payment would be due by 31 January 2028.

Payments on account, which are advance payments towards your next year's tax bill, will also continue under MTD ITSA, due on 31 January and 31 July. The real-time view provided by quarterly updates may help you better estimate your tax liability and manage these payments.

How MTD ITSA Streamlines This:

By having your business income and expenses digitally recorded and regularly updated, the preparation of the Final Declaration becomes significantly simpler. Much of the core data will already be in HMRC's system, validated through your quarterly updates and EOPS. This reduces the last-minute scramble and potential for errors often associated with the traditional annual Self Assessment deadline. It allows for a more continuous and integrated approach to tax management throughout the year.

Choosing MTD-Compatible Software: Your Essential Tool

Under MTD ITSA, using MTD-compatible software is not optional; it is a mandatory requirement for keeping digital records and submitting your quarterly updates, EOPS, and Final Declaration to HMRC. Selecting the right software is a critical decision for ensuring compliance and streamlining your tax affairs.

Why Software is Mandatory:

HMRC's MTD ITSA framework is built on the principle of digital links between your business records and their systems. This digital link must be maintained throughout the entire process, from recording transactions to submitting returns. Only software that has been approved by HMRC for MTD can establish and maintain this link, sending data directly and securely.

Key Features to Look For:

When evaluating MTD-compatible software, consider the following essential features:

Bank Feeds: Automatic import of transactions from your bank account to minimise manual data entry.
Expense Categorisation: Tools to easily categorise income and expenses according to HMRC's requirements.
MTD Submission Capability: Direct integration with HMRC's API for submitting quarterly updates, EOPS, and Final Declarations.
Real-Time Insights: Dashboards and reports that show your current financial position and estimated tax liability.
Invoicing and Billing: Tools to create and send professional invoices, directly linking to your income records.
Receipt Capture: Ability to upload or photograph receipts, linking them to transactions for audit trails.

How AccountsOS Fits In:

AccountsOS is designed to be your comprehensive MTD ITSA solution. We provide:

Automated Digital Record-Keeping: Seamless bank integration and intelligent categorisation ensure your income and expenses are always MTD-compliant.
Effortless Quarterly Update Generation: Our system compiles your data into the required summaries, ready for submission to HMRC with minimal effort.
EOPS and Final Declaration Support: Tools and guidance to help you make necessary adjustments and complete your annual declarations accurately.
Real-Time Tax Estimates: See your estimated Income Tax liability update as you record transactions, empowering better financial planning.
User-Friendly Interface: Designed for small business owners and landlords, making MTD compliance simple and intuitive.

HMRC-Approved Software List:

HMRC maintains a list of software providers that are compatible with MTD for Income Tax Self Assessment. It is essential to choose software from this list to ensure you meet your legal obligations. AccountsOS is continuously updated to ensure full compliance with the latest HMRC requirements.

Preparing for MTD ITSA: A Step-by-Step Guide

The transition to MTD ITSA requires preparation. By following a structured approach, you can ensure a smooth shift to the new digital tax regime.

Step 1: Understand if You're Affected

Determine your gross income from all self-employment and property businesses.
Check the mandatory thresholds: £50,000+ from April 2026, £30,000+ from April 2027.
If you fall below the threshold, decide if you want to join voluntarily.

Step 2: Choose MTD-Compatible Software

Research and select MTD-compatible accounting software, such as AccountsOS, that meets your business needs and is on HMRC's approved list.
Consider features like bank feeds, expense categorisation, and direct submission capabilities.

Step 3: Register for MTD ITSA

Once you have your software, you will need to formally register for MTD ITSA with HMRC.
Important: Do not register too early. Registering before you are ready to use your MTD software can disrupt your existing Self Assessment filing. HMRC will provide specific guidance on when to register.

Step 4: Set Up Digital Record-Keeping

Migrate your existing records (if any) into your chosen MTD software.
Connect your business bank accounts to enable automatic transaction import.
Establish a routine for regularly categorising transactions and capturing receipts digitally.

Step 5: Practice Quarterly Reporting

Familiarise yourself with the quarterly reporting periods and deadlines.
Use your software to review and prepare your first few quarterly updates. Even if not yet mandatory, practicing will build confidence.

Step 6: Seek Professional Advice

Consider consulting with an accountant or tax adviser who is knowledgeable about MTD ITSA. They can help with complex adjustments, ensure compliance, and provide strategic tax planning advice.
Many accountants are already familiar with MTD VAT and can guide you through the ITSA transition.

Timeline for Preparation:

Given the April 2026 and April 2027 deadlines, businesses should ideally begin their preparation well in advance. Starting 6-12 months before your mandatory start date allows ample time to select software, get comfortable with digital record-keeping, and iron out any issues without the pressure of an imminent deadline. Proactive preparation will minimise disruption and ensure a smooth transition.

Penalties for Non-Compliance with MTD ITSA

HMRC is introducing a new penalty system for MTD ITSA to encourage compliance with the new digital reporting requirements. It is essential to understand these penalties to avoid unnecessary fines.

The New Points-Based Penalty System:

For late submissions of quarterly updates, HMRC is implementing a points-based penalty system, similar to driving licence points.

Each missed submission deadline (quarterly update, EOPS, or Final Declaration) will result in a point.
Once you reach a certain threshold of points (e.g., 4 points for annual filers, 2 points for quarterly filers), a financial penalty will be issued.
Points expire after a certain period of compliance.

The aim is to penalise persistent non-compliance rather than isolated, minor infringements. However, even a single missed deadline can contribute to reaching a penalty threshold.

Types of Penalties:

Scenario	Penalty
Late quarterly update submission	Points-based system, leading to fines.
Failure to keep digital records	Penalty for non-compliance.
Errors in submissions	Penalties for inaccurate returns, potentially up to 100% of the tax due if deliberate.

Interest on Late Payments: In addition to penalties for late filing or errors, HMRC will also charge interest on any tax that is paid late. This interest accrues from the payment due date until the tax is paid in full and can add significantly to your overall tax liability.

Avoiding Penalties:

The best way to avoid MTD ITSA penalties is to:

Start preparing early for MTD ITSA.
Choose reliable, MTD-compatible software like AccountsOS.
Keep accurate and up-to-date digital records throughout the year.
Submit all quarterly updates, EOPS, and the Final Declaration on time.
Review your submissions carefully for accuracy before sending them to HMRC.
Seek professional help if you are unsure about any aspect of MTD ITSA.

Benefits of MTD ITSA for Small Businesses and Landlords

While the transition to MTD ITSA may seem daunting, it offers several long-term benefits for small businesses and landlords:

Improved Financial Visibility: Quarterly updates provide a more current view of your business's financial performance and estimated tax liability, enabling better cash flow management.
Reduced Errors: Digital record-keeping and automated software features minimise manual errors, leading to more accurate tax returns.
Easier Tax Planning: With real-time data, you can better forecast your tax bill and plan for payments, avoiding year-end surprises.
Streamlined Process: The continuous flow of information throughout the year makes the annual tax declaration less of a burden.
Better Business Decisions: Access to up-to-date financial information supports more informed business decisions and growth strategies.
Increased Efficiency: Automated processes, such as bank feeds and categorisation, save time that can be reinvested into your business.

Ultimately, MTD ITSA is designed to integrate tax into your everyday business processes, making it a more natural and less stressful part of running your enterprise or managing your property portfolio.

How AccountsOS Helps with MTD ITSA Compliance

AccountsOS is built to simplify Making Tax Digital for Income Tax Self Assessment, ensuring you meet HMRC's requirements with ease.

Automated Digital Records

Connect bank accounts and automatically categorise transactions, ensuring MTD-compliant digital records.

Effortless Quarterly Updates

Generate and submit your quarterly income and expense summaries directly to HMRC with a few clicks.

EOPS & Final Declaration Support

Guidance and tools to prepare your End of Period Statement and Final Declaration, including all necessary adjustments.

Real-Time Tax Estimates

See your estimated tax liability update throughout the year, helping you budget and avoid year-end surprises.

Frequently asked questions

What if my income falls below the MTD ITSA threshold?

If your gross income falls below the mandatory threshold, you are not required to join MTD ITSA, but you can choose to do so voluntarily. You would continue to use the traditional Self Assessment system.

Can I still use spreadsheets for my records?

You cannot use spreadsheets as your sole method of digital record-keeping. You must use MTD-compatible software or 'bridging software' that can extract data from a spreadsheet and submit it to HMRC digitally.

What if I have multiple businesses or properties?

If your combined gross income from all self-employment and property businesses exceeds the threshold, you must comply with MTD ITSA for all of them. Your MTD-compatible software should be able to handle multiple income sources.

Do I still need an accountant with MTD ITSA?

While MTD aims to simplify tax, an accountant can still provide invaluable advice, ensure compliance, handle complex adjustments, and help you optimise your tax position. AccountsOS can assist your accountant.

When do I actually pay my Income Tax under MTD ITSA?

The payment dates for Income Tax will remain the same as the current Self Assessment system. Payments on account are due on 31 January and 31 July, with any balancing payment due on 31 January following the tax year.

What is the difference between MTD ITSA and MTD VAT?

MTD ITSA applies to Income Tax Self Assessment for self-employed individuals and landlords. MTD VAT applies to Value Added Tax for VAT-registered businesses. Both require digital record-keeping and digital submissions to HMRC, but for different taxes.

What if I am digitally excluded or have religious objections?

HMRC provides exemptions for individuals who are genuinely digitally excluded, or for whom digital submission is not reasonably practicable due to age, disability, remoteness of location, or religious beliefs. You must apply for an exemption.

How do I register for MTD ITSA?

Once you have MTD-compatible software, you will need to register with HMRC for MTD ITSA. You should not register too early, as this can affect your ability to file your current Self Assessment returns.