UK Tax Record-Keeping & Deadlines: A Complete Compliance Guide (2025/26)

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UK tax record-keeping and deadlines are the practical foundation of compliance. This guide brings together the records you must keep and for how long, the key filing and payment deadlines across the main taxes, the penalties for missing them, and the habits that keep you compliant — a reference for individuals and businesses alike.

What records do I need to keep?

You must keep records that support every figure on your tax returns. For individuals, that means details of income, bank interest, dividends, and any reliefs claimed. The self-employed and landlords must keep business records — invoices, receipts, bank statements, mileage logs and expense records. Companies must keep accounting records detailed enough to prepare accurate accounts and a corporation tax return.

The principle across all taxes is the same: if you can’t substantiate a figure, HMRC can challenge it. Good records aren’t just a legal requirement; they’re your protection in an enquiry and the basis of an accurate return. Increasingly, under Making Tax Digital, these records must be kept digitally, reinforcing the shift toward software-based bookkeeping.

How long must records be kept?

The retention periods vary. Individuals filing Self Assessment should keep records for at least 22 months after the end of the tax year. The self-employed and landlords must keep them for at least five years after the 31 January filing deadline. Companies must keep records for six years from the end of the accounting period. VAT records must generally be kept for six years too.

These periods can extend where an enquiry is open or where deliberate errors are involved, given HMRC’s longer assessment time limits. Because you may need to substantiate a return years after filing, keeping records for the full required period — ideally digitally and well organised — is essential. Destroying records too early can leave you unable to defend your position if HMRC asks questions later.

What are the key tax deadlines?

Each tax has its own deadlines. Self Assessment returns and payment are due by 31 January after the tax year, with a second payment on account by 31 July. CGT on UK residential property must be reported and paid within 60 days of completion. Corporation tax is due nine months and one day after the accounting period ends, with the CT600 filed within twelve months. VAT returns and payment are typically due one month and seven days after each quarter.

Missing any of these triggers penalties. The deadlines are fixed and unforgiving, so building them into a calendar — with reminders set well in advance — is the simplest compliance habit. For businesses juggling several taxes, a clear deadline schedule prevents the costly oversight of letting one slip while focused on another.

What penalties apply for missing deadlines?

Late filing and payment carry automatic penalties. Self Assessment imposes an immediate £100 for a late return, with daily and percentage charges as the delay grows. VAT uses a points-based system leading to fixed penalties. Corporation tax and other taxes have their own late-filing penalties. Late payment of any tax attracts interest and, often, additional surcharges.

Crucially, filing and payment penalties are separate, so you can incur both. The penalties escalate with time, turning a short delay into a much larger bill if left unaddressed. The clear lesson is to file on time even if you can’t pay immediately, then arrange payment — and to never simply ignore a deadline, as the cost only grows.

What if I can’t pay on time?

If you can’t pay tax by the deadline, contact HMRC promptly to discuss a Time to Pay arrangement, which spreads the tax over instalments. Interest still applies, but agreeing an arrangement avoids escalating enforcement action. The key is to act before the deadline or as soon as possible after, rather than ignoring the bill and letting penalties and enforcement build.

HMRC generally prefers a realistic payment plan to non-payment, and many taxpayers successfully arrange to spread their liability. What it won’t accept is silence. Engaging early, proposing a workable plan, and keeping to it is far better than missing payment without explanation, which can lead to surcharges, distraint and other recovery action on top of the interest.

How do good records and habits keep me compliant?

Compliance is far easier with good systems than with last-minute effort. Keeping records digitally and up to date, reconciling regularly, setting aside tax as it’s earned, and tracking deadlines on a calendar turn tax from a recurring crisis into a routine. Under Making Tax Digital, digital record-keeping is becoming mandatory anyway, so adopting it early serves both compliance and peace of mind.

These habits also reduce errors, which lowers the risk of penalties and enquiries. A taxpayer or business with organised records, money set aside for tax, and deadlines under control rarely faces a compliance problem. The investment in good systems — software, routines, and where helpful an accountant — pays for itself many times over in avoided penalties, interest and stress.

A practical example: an organised sole trader

Picture a sole trader who records every transaction in cloud software as it happens, sets aside a percentage of each payment for tax in a separate account, keeps digital copies of receipts, and has all key deadlines in a calendar with reminders. When 31 January arrives, their return is straightforward, the tax is already saved, and there’s no scramble or penalty risk.

Contrast this with a trader who gathers a year’s receipts each January, has spent the tax money, and risks missing the deadline. The same business, the same income — but a completely different experience of compliance. The example captures the whole message: good records and habits don’t just satisfy HMRC, they make tax manageable and stress-free, year after year.

How does Making Tax Digital change record-keeping?

Making Tax Digital is transforming record-keeping from optional paper or spreadsheets to mandatory digital records in compatible software. Already required for VAT and rolling out for Income Tax from April 2026, MTD means the way you keep records — not just what you keep — is now regulated, with digital links connecting your records to your submissions.

This shift makes good digital record-keeping a legal requirement rather than just best practice. The upside is that compliant software, by capturing transactions as they happen, makes meeting deadlines and producing accurate returns far easier. Adopting digital record-keeping early — ahead of being mandated — both ensures compliance and delivers the real-time financial visibility that helps run a business or property portfolio well.

How should businesses manage multiple tax deadlines?

Businesses face deadlines across several taxes — Self Assessment or corporation tax, VAT, PAYE, and CGT on any disposals — each with its own dates. Managing them well means maintaining a single deadline calendar covering every obligation, setting reminders well in advance, and ideally using accounting software that flags upcoming filings. Delegating to an accountant adds a further safeguard.

The risk for businesses is that focusing on one tax lets another slip, incurring needless penalties. A consolidated view of all deadlines, reviewed regularly, prevents this. For owner-managers juggling many responsibilities, this kind of systematic deadline management is one of the simplest, highest-value compliance habits, turning a scattered set of obligations into a controlled, predictable schedule.

Why compliance habits pay off long-term

Good record-keeping and deadline management deliver benefits well beyond avoiding penalties. They make returns accurate and quick to prepare, provide the evidence to defend any enquiry, give a clear picture of your finances for decision-making, and reduce the stress that disorganised tax affairs create. Over years, these habits compound into a calm, controlled relationship with the tax system.

As Making Tax Digital extends across taxes, the foundation of good digital records becomes ever more central. Building these habits now — organised records, money set aside for tax, deadlines tracked, and software in place — prepares you for the future direction of UK tax while making today’s compliance straightforward. It’s the unglamorous but essential discipline that underpins everything else in managing tax well.

Common record-keeping and deadline mistakes

Frequent failures include destroying records too early, missing one tax’s deadline while focused on another, spending collected VAT or set-aside income tax, and ignoring a bill rather than arranging Time to Pay. Each can produce penalties, interest, or an inability to defend a return in an enquiry.

Avoiding them means keeping records for the full required period, maintaining a consolidated deadline calendar, ring-fencing tax money as it arises, and engaging HMRC early if you can’t pay. These straightforward habits prevent the most common and avoidable compliance problems, and they become even more important as Making Tax Digital makes organised digital records a legal requirement across more taxes.

What digital tools help with tax compliance?

A range of tools now support compliance: cloud accounting software that captures transactions and flags deadlines, receipt-capture apps that digitise paperwork, bank feeds that automate reconciliation, and MTD-compatible packages that submit returns directly to HMRC. Together these turn record-keeping and filing from manual chores into largely automated processes.

Choosing the right tools for your size and complexity — and learning to use them well — pays off in time saved, errors avoided and deadlines met. As Making Tax Digital expands, these tools shift from optional conveniences to practical necessities. Investing in good software and the habits to use it is increasingly the foundation of straightforward, low-stress tax compliance for individuals and businesses alike.

How long should I keep records after closing a business?

Even after ceasing to trade or closing a company, record-retention obligations continue. The self-employed should keep business records for the required period after their final return, and a company’s records must generally be kept for six years from the end of its last accounting period, even after dissolution. HMRC can still enquire into the final periods within the normal time limits.

This catches people out, as the instinct on closing a business is to clear out the paperwork. But disposing of records too soon can leave you unable to respond to a later enquiry into the final years of trading. Keeping the records for the full required period after closure — ideally digitally, which makes storage easy — ensures you remain able to substantiate those final returns if HMRC asks.

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