How to Pay Corporation Tax Online: UK Companies Guide 2026

How to Pay Corporation Tax Online: Quick Answer

To pay Corporation Tax online, first check the amount due and your payment deadline, then locate the 17-character Corporation Tax payment reference for the accounting period you are paying. You can then make your payment using an HMRC-supported electronic payment method.

1. Check how much Corporation Tax your company owes.
2. Confirm the Corporation Tax payment deadline.
3. Find the correct 17-character payment reference for that accounting period.
4. Choose an HMRC-supported payment method.
5. Allow enough time for the payment to reach HMRC.
6. Keep confirmation of the payment for your records.

For many companies with taxable profits of up to £1.5 million, Corporation Tax is normally due 9 months and 1 day after the end of the accounting period. Different rules can apply to companies that must make instalment payments.

understanding Corporation Tax before working through the payment process below.

Speak With an Advisor About Corporation Tax Deadlines

What You Need Before Paying Corporation Tax in 2026

Before making a Corporation Tax payment in 2026, it is important to ensure you have the correct details to avoid misallocation or delays with HMRC.

• Your 10-digit Unique Taxpayer Reference (UTR)
• Your company’s registered details with HMRC
• The correct accounting period
• The exact Corporation Tax amount due based on final or estimated figures

Find the Correct Corporation Tax Payment Reference

Before you pay your Corporation Tax, check that you are using the 17-character Corporation Tax payment reference for the correct accounting period. You can normally find it on your notice to deliver a Company Tax Return, on an HMRC reminder, or through your company’s HMRC online account.

Your Corporation Tax payment reference changes for each accounting period. If you have previously saved HMRC as a payee in online banking, do not automatically reuse the old reference. Using an incorrect reference can delay the payment being allocated or result in it being applied to a different tax liability.

If you need more context on how the period itself determines your tax obligations and deadlines, read our guide to accounting periods for Corporation Tax.

The Corporation Tax figure you pay must be based on your finalised company accounts. If you are unsure how your accounts translate into your tax liability, read our guide on the key company accounts and Corporation Tax facts you need to know before making your payment.

How to Pay Corporation Tax Online

HMRC provides several ways to make Corporation Tax payments. The right method depends partly on how close you are to the payment deadline, so always check the expected processing time before making your payment. If you first need to understand who pays Corporation Tax, what profits are taxable or how the tax works, read our complete guide to understanding Corporation Tax.

1. Pay Through Your Online or Mobile Bank Account

You can start a Corporation Tax payment online and approve it through your online or mobile banking service. HMRC will direct you to your bank to authorise the payment. You will need the correct 17-character Corporation Tax payment reference for the accounting period you are paying.

2. Pay by Faster Payments, CHAPS or Bacs

You can pay Corporation Tax using online or telephone banking. Faster Payments will usually reach HMRC on the same or next day, while CHAPS will usually arrive on the same working day when made within your bank’s processing times. Bacs payments normally take 3 working days.

Check the HMRC payment details provided for your Corporation Tax account and make sure the correct payment reference is entered before confirming the transfer.

3. Pay by Direct Debit

You can set up and manage a Direct Debit through your company’s HMRC online account. Allow sufficient time when setting up a Direct Debit for the first time and check HMRC’s current processing times before relying on it for a payment close to the deadline.

4. Pay Corporation Tax by Debit or Corporate Credit Card

You can also pay Corporation Tax online using an eligible debit or corporate credit card. Check HMRC’s current payment conditions and any applicable card charges before completing the transaction.

Always confirm the payment method, processing time and payment reference before submitting the payment, particularly when the Corporation Tax deadline is close.

Talk to an Expert About Corporation Tax Payments

How Long Does It Take to Pay Corporation Tax Online?

When you pay your Corporation Tax, choose a method that gives HMRC enough time to receive the payment before your deadline. Missing the payment date can result in interest being charged, so understanding your Corporation Tax payment deadline is important before selecting a payment method.

If your payment deadline falls on a weekend or bank holiday, check HMRC’s rules for your chosen payment method and make sure the payment is made early enough to count as received on time.

Corporation Tax Payment Rules You Should Be Aware of in 2026

HMRC continues to enforce strict compliance rules in 2026, particularly around payment accuracy and timing.
Even small errors can result in delays or penalties being applied to your company tax account.

• Payments must clear HMRC by the deadline, not just be initiated on time
• Incorrect references can delay allocation to your 2026 Corporation Tax record
• Larger companies may still be required to pay in instalments throughout the year

If you are unsure exactly when your payment deadline falls or whether quarterly instalment rules apply to your company read our complete guide to the important Corporation Tax deadlines you need to know.

Businesses with overseas elements or UK property interests face additional registration and payment considerations that go beyond the standard process offshore property developers in particular are subject to specific Corporation Tax registration requirements for non-UK property businesses that must be in place before any payment obligations can be correctly fulfilled.

What to Do After You Pay Corporation Tax Online

After you pay Corporation Tax online, keep the payment confirmation or bank transaction record and check your company’s HMRC account to make sure the payment has been allocated correctly.

If the payment does not appear as expected, first check that you used the correct 17-character payment reference and allowed enough processing time for your chosen payment method. The payment reference is linked to the relevant Corporation Tax accounting period, which is why using the correct reference is important.

Keeping accurate payment records also makes it easier to reconcile the amount paid against your annual Corporation Tax calculation. For a broader explanation of the tax itself, see our UK Corporation Tax guide.

Common Corporation Tax Payment Mistakes in 2026

• Using the wrong payment reference number for HMRC
• Paying the incorrect accounting period (especially around 2026 year-end cycles)
• Missing deadlines due to bank processing times
• Not reconciling payments with submitted Corporation Tax returns
• Reusing a Corporation Tax payment reference from a previous accounting period.
• Choosing a payment method without allowing enough time for the payment to reach HMRC by the deadline.

One of the easiest mistakes to make with Corporation Tax payments is reusing saved HMRC bank details without checking the payment reference. The reference changes between accounting periods, so verify it each time before authorising a payment. You can learn more about how these periods affect your liability in our guide to Corporation Tax accounting periods.

Payment errors are often a downstream consequence of errors made earlier in the return process in profit calculations, expense adjustments, or relief claims. Read our guide on how an accountant safeguards your company tax return to understand where these upstream mistakes most commonly occur and how to prevent them.

For most companies following the standard payment timetable, the normal deadline to pay Corporation Tax is 9 months and 1 day after the end of the accounting period. Different payment schedules can apply to companies required to make Corporation Tax payments by instalments, so the standard deadline should not automatically be assumed to apply in every case. See our complete Corporation Tax deadlines guide for the payment and filing timelines.

How to Pay a Corporation Tax Penalty

If you need to know how to pay a Corporation Tax penalty, first check the HMRC notice to identify what the charge relates to and the payment instructions provided. Corporation Tax-related penalties and late-payment charges should not be confused with the underlying Corporation Tax liability itself.

Use the payment reference specified by HMRC and check the accounting period carefully before making the payment. If the charge relates to a late Company Tax Return, you can also read our guide to Corporation Tax late filing penalties for more information about the current penalty regime.

It is also important to distinguish between paying Corporation Tax late and filing a Company Tax Return late. Late Corporation Tax payments can attract interest, while separate penalties can apply when a Company Tax Return is filed after its deadline. Our Corporation Tax deadlines guide explains the difference between the payment and filing dates.

Why Corporation Tax Compliance Still Matters

In 2026, Corporation Tax remains one of the most closely monitored areas of business taxation in the UK.
HMRC continues to expect accurate reporting supported by correct calculations and timely payments based on filed company accounts.

If you are unclear on what your company’s filing obligations involve alongside payment  including what the CT600 must contain and when it must be submitted read our full guide on company tax return obligations.

Late or incorrect payments can still lead to interest charges, compliance reviews, and additional scrutiny of your company’s tax position,
particularly where discrepancies arise between accounting periods and submitted returns.

For businesses operating across multiple activities, jurisdictions, or corporate structures, the compliance picture becomes considerably more involved navigating complex tax compliance requires a structured approach that goes beyond simply making payments on time and extends to ensuring every element of the tax position is correctly reported and supported.

How CIGMA Accounting Can Support You in 2026

At CIGMA Accounting, we support limited companies throughout 2026 with Corporation Tax compliance, ensuring payments and filings are handled correctly
and aligned with HMRC expectations.

• Preparation and filing of Corporation Tax returns
• Accurate calculation of Corporation Tax liabilities
• HMRC compliance and payment support
• Tax planning to help manage cash flow and liabilities

Staying on top of payment deadlines also means understanding what is at stake if they are missed. Late filing of company accounts carries its own separate penalty structure to late CT600 submission read our guide on penalties for late filing of company accounts to understand how both sets of penalties work and how to avoid them.

Our aim is to ensure your Corporation Tax obligations are managed smoothly, reducing the risk of penalties and avoiding last-minute compliance pressure.

CASE STUDY: How to Pay Corporation Tax Online Without Using the Wrong HMRC Reference

Ahmed, a company director, visited our Fulham office shortly before his Corporation Tax payment deadline. His company had already calculated its liability, but he was unsure how to pay Corporation Tax online correctly because HMRC was already saved as a payee in the company’s online banking.

During the review, we noticed that the saved payment details contained the 17-character Corporation Tax payment reference from the previous accounting period. We explained that the payment reference changes between accounting periods, so simply reusing an old reference could cause HMRC to allocate the payment incorrectly. Pasted markdown

Ahmed confirmed the current accounting period, amount due and correct payment reference before making the transfer. We also discussed the available payment methods and their processing times. Faster Payments normally reach HMRC on the same or following day, while Bacs generally takes three working days. Pasted markdown

The discussion also clarified that, for many companies with taxable profits up to £1.5 million, Corporation Tax is normally payable 9 months and 1 day after the accounting period ends, although different rules can apply where instalment payments are required. Pasted markdown

Ahmed left understanding that paying the correct amount is only part of Corporation Tax compliance. Using the right accounting-period reference, choosing an appropriate payment method and ensuring HMRC receives the money by the deadline are equally important.