How far back can contractors be retrospectively registered as PAYE employees?

You cannot retrospectively register payroll by reporting payments as if they were made on an earlier date than they actually were. HMRC's Real Time Information (RTI) system requires submissions on or before the actual payday. If a payment was genuinely missed or underpaid, you can process it as "back pay" in the current period and correct previous submissions if necessary.

What are the Accounts Office and Employer PAYE references for HMRC portal setup?

After you register your company for PAYE, HMRC will send you two key reference numbers: your Employer PAYE reference (e.g., 123/AB45678) and your Accounts Office reference (e.g., 123PA00045678). You will need both of these to set up your payroll software and make payments to HMRC.

What can be done to expedite the backdated PAYE process for completion by the deadline?

The concept of "backdated PAYE process" isn't typically one that can be expedited in the sense of reporting payments as if they happened in the past. Instead, if you have arrears of pay or need to correct a previous period, you should process these through your current payroll, making sure to update year-to-date figures in your Full Payment Submission (FPS). If the issue relates to a previous tax year, your accountant can advise on contacting HMRC for reclassification.

How can an employee's earnings cap be rectified due to late declaration?

If an employee's earnings were incorrectly reported or declared late, you should correct this by submitting an updated Full Payment Submission (FPS) with the accurate year-to-date figures. This will adjust the tax and National Insurance calculations for the current period and inform HMRC of the correct total earnings.

Is it possible to take a full salary amount over a few months, or must it be split across the tax year?

While you can technically pay a salary in larger chunks over fewer months, for PAYE purposes, the tax and National Insurance are calculated based on the pay period (e.g., monthly). Spreading your salary evenly across the tax year (6 April to 5 April) is generally the most straightforward approach for PAYE and often the most tax-efficient, as it fully utilises your Personal Allowance and National Insurance thresholds each period. Taking a large salary in a few months could push you into higher tax or NIC bands for those specific periods.

PAYE for limited company directors: the complete guide

Understanding PAYE for Directors

As a limited company director, you are typically both an owner and an employee of your company. If you choose to pay yourself a salary, even if you are the sole director, your company must operate a Pay As You Earn (PAYE) scheme. This system deducts Income Tax and National Insurance Contributions (NICs) directly from your wages before you receive them.

Operating PAYE ensures that your tax and NICs are paid to HMRC throughout the year, rather than as a single lump sum. It also helps you build up qualifying years for your State Pension.

Setting Up Your PAYE Scheme

Registering for PAYE is a crucial first step if your limited company plans to pay salaries or provide taxable benefits. The process is free and generally completed online.

When to register: You must register for PAYE with HMRC before your first payday. It's advisable to do this at least two to four weeks in advance, as HMRC needs time to process your registration and send you the necessary reference numbers. You cannot register more than two months before your first payday.
Information needed: To register, you'll need your company's Unique Taxpayer Reference (UTR), company registration number, and details such as your first payday and the number of employees (including yourself).
Receiving references: After registration, HMRC will send you an Employer PAYE reference and an Accounts Office reference. These are essential for setting up your payroll software and making payments to HMRC.

Running Payroll and Reporting to HMRC

Once your PAYE scheme is set up, you'll need to run payroll regularly. This involves calculating gross pay, deducting Income Tax and NICs, and reporting this information to HMRC.

Full Payment Submission (FPS): For each payday, you must submit a Full Payment Submission (FPS) to HMRC on or before the day you pay your employees (including yourself). This report tells HMRC what you've paid and the deductions you've made.
Employer Payment Summary (EPS): You might need to send an Employer Payment Summary (EPS) if you haven't paid any employees in a tax month, or if you are reclaiming statutory payments (like Statutory Sick Pay or Statutory Maternity Pay). The deadline for submitting an EPS for the previous tax month is the 19th of the current month (if submitting by post).
Paying HMRC: You must pay the Income Tax and National Insurance you've deducted to HMRC monthly or quarterly.
Monthly payments: The deadline for electronic payments is the 22nd of the following tax month. For example, for payments made in May, the deadline is 22 June. If paying by cheque, the deadline is the 19th.
Quarterly payments: Small employers whose average monthly PAYE and NICs bill is typically less than £1,500 may be able to pay quarterly.
Annual reporting:
P60s: By 31 May each year, you must provide a P60 to all employees (including directors) who were on your payroll on the last day of the previous tax year (5 April).
P11D and P11D(b): If your company provides employees or directors with expenses or benefits in kind (BiKs) that are not processed through payroll, you must report these on forms P11D and P11D(b) by 6 July following the end of the tax year. The Class 1A National Insurance on these benefits is then due by 22 July (for electronic payments).

Director's Salary and National Insurance

Many limited company directors choose a combination of salary and dividends for tax efficiency. Your salary is subject to PAYE, while dividends are not, but are taxed differently.

For the 2026/27 tax year, key National Insurance thresholds are:

Lower Earnings Limit (LEL): £6,708 per annum. Earning above this amount helps you qualify for State Pension entitlements, even if you don't pay NICs.
Primary Threshold (Employee NICs start): £12,570 per annum. You will start paying employee NICs on earnings above this amount.
Secondary Threshold (Employer NICs start): £5,000 per annum. Your company will start paying employer NICs on earnings above this amount. The employer NIC rate is 15% on earnings above this threshold (figures for illustration — check current rates).

A common tax-efficient strategy for directors with no other income is to pay a salary up to the Personal Allowance, which is £12,570 for 2026/27. This means no Income Tax is usually due on the salary, and it also aligns with the Primary Threshold for employee NICs, meaning no employee NICs are typically paid. However, employer NICs will be due on earnings above the Secondary Threshold.

Handling Backdated Pay and Corrections

Sometimes, you might need to adjust past payroll. It's important to understand the rules around backdated pay.

Real Time Information (RTI): HMRC's RTI system requires you to report payments on or before the day you pay your employees. This means you cannot legally "backdate" payroll by reporting payments as if they were made earlier than they actually were.
Back pay vs. backdating:
Back pay (or arrears of pay) refers to payments for work already done but not paid correctly at the time, such as a delayed pay rise or an administrative error. This is allowed.
Backdating payroll (reporting a payment as if it happened on a date it didn't) is not allowed.
Correcting errors: If you've made a mistake in a previous payroll submission, you can usually correct it by sending an updated Full Payment Submission (FPS) with the correct year-to-date figures. If the error relates to a previous tax year, you may need to contact HMRC to reclassify the income to the correct year, which can prevent you from losing personal allowance or being pushed into a higher tax bracket unnecessarily.
Timing of tax: Generally, backdated payments are treated as income in the tax year they are received. However, the exact entitlement rule (when the employee became legally entitled to the pay) can impact how tax is calculated, so always check current HMRC guidance.

Common mistakes

Not registering for PAYE on time: Failing to register your company for PAYE before your first payday, even if you're the only director taking a salary.
Missing FPS deadlines: Not submitting your Full Payment Submission (FPS) on or before the day you pay your salary. This is an RTI requirement.
Incorrect National Insurance calculations: Misunderstanding the different National Insurance thresholds for employees and employers, leading to incorrect deductions or payments.
Confusing back pay with backdating: Attempting to report payments as if they occurred in a past period when they were actually paid later, which is against RTI rules.
Ignoring P11D obligations: Forgetting to report benefits in kind (BiKs) on P11D forms and pay Class 1A NICs, if applicable.

Frequently asked questions

Was this article helpful?