Outsourcing accounting for UK businesses means handing bookkeeping, VAT returns, payroll, year-end accounts and tax filings to an external team while the directors keep legal responsibility for every submission. In 2026 the decision turns less on headcount and more on compliance load: Making Tax Digital now reaches sole traders and landlords, Companies House requires verified identities, and HMRC expects payroll data on or before every payday.
This guide sets out the UK rules any provider has to work within, which tasks are sensible to outsource, how to handle UK GDPR when data leaves the country, and an illustrative cost comparison. It is written for owner-managed companies, sole traders and finance leads weighing outsourcing accounting for UK businesses against hiring in-house.
A typical outsourced arrangement covers four layers of work. The first is transaction processing: bank feeds, supplier bills, sales invoices and reconciliations. The second is statutory compliance, which in the UK means VAT returns, PAYE and RTI submissions, annual accounts for Companies House and the Company Tax Return for HMRC. The third is management reporting, such as monthly profit and loss, cash flow and aged debtor reports. The fourth, which smaller firms often add later, is advisory work such as budgeting and fractional finance leadership.
Most businesses start with the first two layers because they are rules-based and deadline-driven. A useful starting point is a task-by-task review of which accounting tasks to outsource and which to keep in-house, since approval of payments and final sign-off of returns should normally stay with the directors.
Outsourcing does not move legal liability. HMRC and Companies House hold the company and its directors responsible for what is filed, so the engagement needs clear review points before anything is submitted.
GOV.UK states that "All VAT-registered businesses should now be signed up for Making Tax Digital for VAT." In practice, this means VAT records must be kept in compatible software and returns filed through it. The compulsory VAT registration threshold is £90,000 of taxable turnover in a rolling 12 months, according to HMRC's registration guidance.
An outsourced bookkeeper working in Xero, QuickBooks or Sage handles the digital records and the return, but the business still has to supply complete sales and purchase data on time. The site's guide to UK VAT MTD, digital links and penalty reform covers the record-keeping rules in more detail.
Sole traders and landlords are now in scope. According to HMRC's guidance on when to use Making Tax Digital for Income Tax, the rollout is phased by qualifying income, which HMRC defines as total self-employment and property income before expenses.
| Qualifying income in tax year | Threshold | Must use MTD for Income Tax from |
|---|---|---|
| 2024 to 2025 | over £50,000 | 6 April 2026 |
| 2025 to 2026 | over £30,000 | 6 April 2027 |
| 2026 to 2027 | over £20,000 | 6 April 2028 |
Anyone in the first group should already be keeping digital records and sending quarterly updates. HMRC's quarterly update guidance gives deadlines of 7 August, 7 November, 7 February and 7 May for the standard update periods. Four cumulative submissions a year is a real workload increase for a self-employed person who used to do one return each January, and it is one of the main reasons smaller UK clients now ask about outsourced bookkeeping.
The rates for the Corporation Tax year starting 1 April 2026 are unchanged from the previous year. HMRC's Corporation Tax rates and allowances table lists the following for 2026:
| Item | 2026 figure |
|---|---|
| Small profits rate (profits under £50,000) | 19% |
| Main rate (profits over £250,000) | 25% |
| Marginal Relief lower limit | £50,000 |
| Marginal Relief upper limit | £250,000 |
| Standard fraction | 3/200 |
Both limits are reduced for short accounting periods and for associated companies, so the group structure needs to be checked before relying on the small profits rate.
Take a standalone company with taxable profits of £100,000 for a 12-month period starting 1 April 2026, with no associated companies.
That is an effective rate of 22.75%. The figure depends entirely on the taxable profit figure being right, which is why clean month-end books matter more than the return itself. If an enquiry follows, the steps in handling an HMRC tax investigation are far easier with reconciled ledgers.
GOV.UK's guide to accounts and tax returns for private limited companies sets these deadlines:
| Obligation | Deadline |
|---|---|
| First accounts to Companies House | 21 months after the date of registration |
| Annual accounts to Companies House | 9 months after the financial year ends |
| Pay Corporation Tax | 9 months and 1 day after the accounting period ends |
| File the Company Tax Return | 12 months after the accounting period ends |
Corporation Tax is paid before the return is due. Many small companies miss this because they treat the two dates as one, and an outsourced team should plan the year-end close around the payment date.
Identity verification became a legal requirement on 18 November 2025, which GOV.UK describes as the start of a 12-month transition period, so that period ends in November 2026. Under Companies House guidance on when you need to verify your identity, existing directors provide their Companies House personal code as part of the company's next confirmation statement. People with significant control who are not directors provide their code within the first 14 days of their birth month.
For a company that outsources its secretarial work, the practical point is timing. If the confirmation statement falls due before every director has a personal code, the filing cannot be completed correctly. An Authorised Corporate Service Provider, such as a registered accountant, can carry out verification on a person's behalf, so it is worth asking any prospective provider whether they hold that status.
Payroll is often the first function a UK business outsources, because the reporting cycle is short. HMRC's guidance on reporting payroll to HMRC says: "Send the FPS on or before your employees' payday, even if you pay HMRC quarterly instead of monthly." The Full Payment Submission is the core RTI filing, and late or missing submissions can lead to penalties.
For 2026 to 2027, HMRC's rates and thresholds for employers set employer Class 1 National Insurance at 15% above a secondary threshold of £5,000 a year, with an Employment Allowance of £10,500 for eligible employers. Workplace pension auto-enrolment adds a minimum employer contribution of 3% of qualifying earnings, and the government has kept the qualifying earnings band at £6,240 to £50,270 a year for 2026 to 2027.
An outsourced payroll service should run the FPS, pension contributions, payslips, starters and leavers, and year-end tasks. The business still has to approve pay changes and report new joiners in good time.
Outsourcing accounting almost always means sharing personal data: employee pay records, customer names and supplier bank details. Two rules from the ICO apply.
First, the provider is usually a processor. The ICO says that "every time a controller uses a processor to process personal data, there must be a written contract". That contract must cover processing only on documented instructions, confidentiality, security, use of sub-processors, and what happens to the data when the engagement ends.
Second, if the provider's staff or servers are outside the UK, the arrangement is a restricted transfer. The ICO's brief guide to international transfers describes this as "a transfer of personal information to a separate organisation located outside the UK," and notes that making data accessible counts as well as sending it. Every restricted transfer needs one of these mechanisms:
Where a business relies on a safeguard, the ICO adds: "you must also ensure that you have completed a transfer risk assessment (TRA)." Ask any offshore or nearshore provider which mechanism they rely on and for a copy of the signed agreement. The site's guide to vendor risk assessment covering SOC 2, GDPR and ISO 27001 lists the security evidence to request alongside it.
The table below is a practical split based on common practice. It is guidance, and each business should adjust it to its own controls.
| Task | Usually outsourced | Usually kept in-house |
|---|---|---|
| Bank and card reconciliations | Yes | Review of exceptions |
| Purchase ledger processing | Yes | Approving and releasing payments |
| Sales invoicing and credit control | Often | Customer disputes |
| VAT return preparation | Yes | Director approval before submission |
| Payroll and RTI | Yes | Pay rises, hires and leavers |
| Year-end accounts and CT600 | Yes | Director sign-off |
| Confirmation statement and ID checks | Often | Each person's own verification |
| Budgets and forecasts | Sometimes | Strategic decisions |
Software choice shapes how smoothly this works. Most UK providers work in cloud ledgers, and the comparison of Xero vs Sage helps if the business has not yet settled on one. Companies that need board-level reporting on top of compliance can add part-time support through fractional CFO services in London and the UK.
The figures below are illustrative. The salary and the outsourced fee are assumptions for the example, and actual quotes vary widely by volume, sector and region. The statutory rates are the 2026 to 2027 figures cited above.
In-house bookkeeper (illustrative salary of £30,000):
Outsourced service (illustrative quote):
On these assumptions the outsourced route costs £20,962.80 less per year. Two caveats apply. Employment Allowance may wipe out the employer National Insurance for an eligible small employer, which narrows the gap by £3,750 to £17,212.80. And the in-house figure buys one person's time, while the outsourced fee covers a defined scope, so anything outside it will be billed separately. For a fuller method, see the breakdown of how much it costs to outsource accounting services and the analysis of the true cost of in-house vs outsourced accounting staff in 2026.
A short checklist keeps the handover orderly:
Is a UK business still responsible for its tax returns if it outsources accounting? Yes. The company and its directors remain responsible for what is filed with HMRC and Companies House. The provider prepares and submits, but directors should review and approve each return.
Do I need MTD for Income Tax if I already file VAT through MTD? They are separate obligations. MTD for Income Tax depends on qualifying self-employment and property income, with thresholds of £50,000 from April 2026, £30,000 from April 2027 and £20,000 from April 2028.
Can an outsourced accountant verify my identity for Companies House? An Authorised Corporate Service Provider can verify identity on a person's behalf. Directors can also verify themselves through GOV.UK One Login and pass on their personal code.
Is it legal to use an accounting team based outside the UK? Yes, provided the transfer of personal data meets UK GDPR. That means UK adequacy regulations for the destination, or a safeguard such as the IDTA or Addendum backed by a transfer risk assessment.
What is the Corporation Tax rate for a company with £100,000 of profit in 2026? A standalone company with a 12-month period pays the 25% main rate less Marginal Relief, which gives £22,750, an effective rate of 22.75%.
Madras Accountancy provides outsourced bookkeeping, tax preparation, payroll support, audit support and CFO advisory services. To discuss which parts of your UK finance function could be handed over and how the compliance calendar would work, contact our team.
The section 4960 excise tax is 21% of nonprofit pay over $1M. From 2026 it covers all employees. See the medical carve-outs, Form 4720 and a worked example.
The paid family and medical leave tax credit is permanent from 2026. See the 12.5% to 25% rates, the premium option, the 6-month rule and how Form 8994 works.
Opportunity zones become permanent in 2027 under the One Big Beautiful Bill. See the new deferral, rural bonus, and the 2026 handoff.
