VAT Bridging Software UK 2026: What It Is, Whether You Need It, and What to Use Instead

MTD for VAT requires two things: you must keep your VAT records digitally, and there must be a continuous digital link between those records and the figures you submit to HMRC. A digital link means that data flows electronically from one system to another without anyone retyping it by hand. Copy-pasting from a spreadsheet into HMRC's website is explicitly not permitted.

Bridging software solves the second requirement. You keep your VAT workings in a spreadsheet as you always have. When it is time to file, the bridging tool connects to your spreadsheet, reads the 9 VAT box values from specific cells, and sends them to HMRC via the MTD API. The submission happens digitally, the digital link is preserved, and HMRC receives the return.

The bridging tool does not touch your bookkeeping. It does not categorise transactions, calculate VAT, check your figures, or store your accounting records. It is a pipe between your spreadsheet and HMRC, nothing more.

Most bridging tools work either as an Excel or Google Sheets add-in that you install and authorise, or as a standalone web app where you paste in your 9 figures and click submit. Either way, you authenticate with your HMRC Government Gateway credentials (or grant the tool access via HMRC's API), and the tool submits on your behalf.

No. This is one of the most common points of confusion around MTD compliance.

Full MTD accounting software (such as AccountsOS, Xero, QuickBooks, or Sage) keeps your bookkeeping records digitally within the software itself, calculates your VAT liability from those records automatically, and then submits the return to HMRC directly. The digital link runs from your recorded transactions all the way through to HMRC without any manual steps.

Bridging software assumes you are already keeping records digitally in a spreadsheet and only handles the last step: filing. It does not create a link from your underlying transactions to your spreadsheet; that is your responsibility. If you are working from a paper ledger and typing totals into Excel, bridging software does not make you compliant because the digital link from source transaction to submission still has a gap.

The distinction matters practically. With full software, the entire journey is handled. With bridging software, you are responsible for everything up to the 9 box figures.

Several bridging tools are available. Prices quoted here are indicative at the time of writing and may change; always check the provider's current pricing before purchasing.

123 Sheets is one of the most widely used. It works as a Google Sheets add-in and an Excel add-in, reads named cells in your spreadsheet, and submits to HMRC. Annual pricing is from around £12 to £36 depending on the plan.

VitalTax is a web-based bridging tool with an Excel add-in option. It supports MTD VAT and is straightforward to use. Pricing starts from around £12 per year for a single business.

Easy MTD VAT is a desktop Windows application rather than a cloud tool. It stores your VAT returns locally and submits via the MTD API. It suits businesses that prefer not to use cloud services. Pricing is from around £10 per year.

#GoFile is another web-based option with a focus on simplicity. You enter or paste your 9 box figures and submit. Pricing is from around £10 to £20 per year.

All four tools are MTD-compatible, meaning they connect to HMRC's API and create the required digital link for the submission step.

Bridging software makes sense in a specific and fairly narrow situation: you run a business where your VAT records are complete and accurate in a spreadsheet, the spreadsheet itself maintains a digital link from your transaction records to the 9 box figures (no manual retyping within the spreadsheet), and you have no need for accounting software beyond filing your VAT return.

The typical user is a very small business or sole trader who has kept records in Excel for years, is familiar with their spreadsheet, and simply needs a compliant way to submit. For that use case, bridging software does the job at low cost.

The situation where bridging software becomes a burden rather than a solution is more common than people expect. As your transaction volume grows, maintaining a spreadsheet that satisfies the digital links requirement correctly is time-consuming and error-prone. Bridging software gives you no help with categorisation, no error checking on the figures, no audit trail, and no alerts if your spreadsheet structure breaks the digital link.

The core limitation is that bridging software does not do any accounting. Every record, every categorisation, every VAT calculation is your responsibility in your spreadsheet. The bridging tool only transmits what you give it.

The digital links requirement is broader than many people realise. HMRC's rules require a digital link not just between your spreadsheet and the submission, but between your primary accounting records and the figures that feed into the 9 boxes. If you are computing Box 1 (VAT due on sales) by adding up a column of manually entered numbers with no underlying digital transaction record, you may not fully satisfy the spirit of the requirement, even if the bridging tool itself creates a compliant submission.

Common practical risks include: entering figures in the wrong cells so the bridging tool picks up incorrect values; changing your spreadsheet layout so cell references break; making manual errors in your bookkeeping that are submitted unchecked; and missing the filing deadline because there is no automated reminder or live view of when your next return is due.

There is also no integration with anything else. You cannot ask bridging software how much VAT you have collected this quarter, whether a specific invoice has been accounted for, or what your effective VAT rate is. It has one function.

For businesses that are growing, adding employees, or dealing with more complex VAT situations (such as partial exemption, multiple rates, or reverse charge), bridging software quickly becomes inadequate.

AccountsOS is built for UK founders and small business owners who want their accounting handled, not managed. Finn, the AI accountant inside AccountsOS, keeps your books, handles VAT, and submits directly to HMRC under MTD. You do not need a bridging tool because the digital link runs end to end within the platform: from the transaction, through categorisation, to the 9-box VAT calculation, to the HMRC submission.

In practical terms: when a payment comes in or goes out, you can forward the receipt to AccountsOS (by email, WhatsApp, or Slack), and Finn categorises it. Your VAT position updates automatically. When your VAT period closes, Finn prepares your return, you review it, and it submits directly to HMRC via the MTD API. No spreadsheet, no bridging tool, no manual steps.

If you are currently using a spreadsheet, you can import it into AccountsOS. The import maps your existing columns using AI, so you do not start from zero.

AccountsOS is MTD-compatible software built to HMRC's MTD VAT API specification and submits VAT returns directly to HMRC. The 14-day free trial requires no card, so you can verify it handles your situation before committing.

The cost comparison is straightforward: bridging software from around £10 to £36 per year, but you still maintain all your records manually. AccountsOS at £20 per month handles your bookkeeping, VAT, invoicing, expenses, and MTD filing. For a business spending even two hours a month on spreadsheet maintenance, the time saving is material.

MTD for VAT has been mandatory for all VAT-registered UK businesses since April 2022. There is no threshold exemption: if you are VAT-registered, you must file through MTD-compatible software.

Your VAT return is due 1 month and 7 days after the end of your VAT period. For a period ending 31 March, the return and payment are due by 7 May. HMRC charges surcharges and interest on late submissions and late payments.

The digital links requirement means that data must flow electronically at every stage between your accounting records and the figures submitted to HMRC. You cannot manually retype or copy-paste figures between systems at any point in the chain. This applies even within a single spreadsheet: if you have a data entry sheet and a VAT calculation sheet, the link between them must be a formula or cell reference, not a manual entry.

HMRC has a soft-landing period for certain aspects of digital links now behind us. As of 2026, full digital links compliance is expected throughout your record-keeping and submission process.

For most small businesses, the simplest way to be certain you are compliant is to use accounting software that handles the entire chain. Bridging software leaves the first part of the chain in your hands.

If any of the following apply, bridging software is likely costing you more than you realise in time, risk, or missed information:

Your transaction volume has grown to the point where spreadsheet maintenance takes more than an hour per month. At that volume, automated categorisation saves meaningful time.

You want to know your VAT position mid-quarter, not just at filing time. Bridging software tells you nothing until you have completed the spreadsheet yourself.

You are spending time reconciling your spreadsheet against your bank statement. Accounting software with a bank connection does this for you.

You are sending invoices and want them automatically included in your VAT calculation. Bridging software does not touch your invoices.

You have had a bridging submission that contained an error you did not notice until after the fact. Full software calculates from your transactions; a human error in the spreadsheet propagates; a categorisation error in accounting software is caught at the transaction level.

You want your accountant (if you use one) to see your books without you sending them a spreadsheet. Cloud accounting software gives them direct access.

For most growing businesses, the question is not whether to switch, but when. The earlier you build accurate digital records, the cleaner your historical data when it matters.