Run payroll

Payroll that runs itself, payslips and all.

Add your team, run payroll, and Finn handles tax codes, NI and pensions, then posts it straight to the ledger. No payroll bureau needed.

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PayrollLive
Run this month's payroll
FDone. 4 payslips sent, PAYE and NI posted to the ledger.
FFinn ran payroll for 4 people in one message.
Live

In short

AccountsOS includes a full payroll engine: employee management with tax codes and NI categories, monthly/weekly payroll runs with PAYE/NI/pension calculations, individual payslips emailed automatically, GL posting (wage expense + PAYE liability + NI liability + pension liability), and FPS (Full Payment Submission) XML generation for HMRC RTI compliance.

RTI
Compliant
Monthly+Weekly
Cadences
Auto-post
To GL

Everything it does

Employees

  • Add and edit employees: start date, salary, tax code, NI category, NI number
  • Pension contributions with provider details
  • Monthly or weekly pay frequency
  • Status: active, on leave, terminated
  • End-date tracking for leavers (P45 generation on roadmap)
  • Multi-trading-entity employee assignment

Running payroll

  • One-click payroll run for all active employees
  • PAYE calculated using current HMRC tax tables
  • NI calculated per category (A, B, C, H, J, M, Z)
  • Pension contributions deducted
  • Net pay calculated
  • Year-to-date figures tracked across the tax year

Payslips

  • Per-employee PDF payslip
  • Emailed automatically via Resend
  • Branded with your company logo
  • YTD figures shown
  • Tax code, NI category, pension shown

RTI submission

  • FPS (Full Payment Submission) XML generated for each run
  • RTI-compliant format
  • EPS (Employer Payment Summary) on roadmap
  • Year-end FPS handling

GL posting

  • Wage expense posted automatically
  • PAYE liability account credited
  • Employee NI liability credited
  • Employer NI cost recognised
  • Pension liability tracked

Capabilities at a glance

Employee management with tax codes, NI categories, pensions

Monthly and weekly payroll runs

Automatic PAYE / NI / pension calculations

Per-employee PDF payslip with email delivery

FPS XML for HMRC RTI

Auto-post to GL (wages, PAYE, NI, pension)

YTD payroll figures

Tax-year aware (current thresholds always live)

How It Works

1

Add employees

Name, start date, salary, tax code, NI category, pension. Takes 2 minutes.

2

Run payroll

One click: generates PAYE/NI/pension figures, payslips and journals.

3

Payslips emailed

Each employee gets their PDF payslip in their inbox automatically.

4

FPS to HMRC

Download the FPS XML or (when live) submit directly. GL is already updated.

By the numbers

FPS
XML output
Real Time Information ready
Auto
Payslip email
Resend delivers to each employee
Tax-year
Aware
Current thresholds always live

Real-world Use Cases

Single-director limited

Pay yourself the optimal director salary, generate payslip, FPS and GL: under 60 seconds a month.

Small team of 3–5

Onboard new starter, set monthly cadence, payroll runs the same day each month with no chasing.

Holiday cover

Mark an employee on leave; payroll skips them automatically until they're back.

Plays nicely with

HMRC RTI

Live (XML)

FPS XML generation; direct submission on the next milestone.

Resend

Live

Payslip email delivery.

Why founders pick this over the spreadsheet

No separate payroll bureau bill

RTI-compliant from day one

Payslips look professional out of the box

GL stays accurate without separate journal entries

YTD figures always available without rebuilding

Frequently Asked Questions

Is this RTI-compliant?

Yes. Every payroll run generates a Full Payment Submission XML in HMRC's required format. Direct submission to HMRC is the next milestone; today you upload the FPS via HMRC's online service.

Does it handle pensions?

Yes. Set the pension provider, contribution rate (employer + employee), and pensions are deducted on every run with the liability tracked in the GL.

What about year-end?

YTD figures are tracked across the tax year and roll over automatically on 6 April. P60 generation is on the immediate roadmap.

Can I run weekly payroll?

Yes. Monthly and weekly cadences both supported. Mix them across employees in the same company.

Tax code changes mid-year?

Update the employee's tax code from any payslip onwards. The change is captured in the audit log.

Multiple companies?

Yes. Assign employees to specific trading entities. Each entity has its own payroll cycle and HMRC PAYE reference.

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Ready to try Payroll?

Set up in minutes. Finn works in the background on your books, wherever you're based.

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