💰 Money, Tax & Records Guide
Money, Tax & Financial Records: Your Rights in 2026
Confused about income tax, Self Assessment, HMRC penalties, or your financial rights? This guide covers the key things you need to know — from PAYE codes to tax refunds and data rights.
✅ Last verified: July 2026📚 Sources: GOV.UK, HMRC, Citizens Advice🇬🇧 Applies across the UK
⚖ Know Your Rights at a Glance
- Income tax personal allowance: £12,570 (2025/26 and 2026/27 — frozen until April 2028).
- Self Assessment deadline: 31 January for online returns; 31 October for paper returns (following the end of the tax year).
- Tax refund: If you've overpaid tax through PAYE, you can claim a refund from HMRC — you have 4 years from the end of the tax year.
- Right to correct a tax return: You can amend a submitted Self Assessment return within 12 months of the filing deadline.
- HMRC can investigate up to 4 years back for innocent errors, 6 years for careless errors, and 20 years for deliberate evasion.
- Your financial data rights: Under UK GDPR, you can request your personal data held by HMRC, banks and financial institutions.
Income tax and PAYE
If you're employed, your income tax and National Insurance are deducted at source through the PAYE (Pay As You Earn) system. Your employer uses a tax code provided by HMRC to calculate deductions.
Common tax codes: 1257L means your personal allowance is £12,570. BR means you're being taxed at basic rate on all earnings (often for a second job). OT means no personal allowance is being applied.
If your tax code is wrong, you could be paying too much or too little tax. Check it against your payslip and contact HMRC if it looks wrong. Overpaid tax is refunded — usually automatically at year end, or you can claim via your personal tax account at gov.uk.
Self Assessment
You must file a Self Assessment return if:
- You're self-employed and earn over £1,000
- You have income over £100,000
- You have untaxed income (rental, dividends, foreign income)
- You received Child Benefit and either you or your partner earned over £60,000
Key deadlines: 31 October for paper returns; 31 January for online returns. Miss the January deadline and you face an automatic £100 penalty, increasing with delay. You can register for Self Assessment at gov.uk.
Tax refunds and overpayments
If you've overpaid income tax through PAYE (for example because you changed jobs, stopped working part-year, or had the wrong tax code), HMRC usually adjusts automatically at year end. But if not:
- You can claim a refund via your personal tax account at gov.uk/personal-tax-account
- You have 4 years from the end of the relevant tax year to claim
- For Self Assessment overpayments, the refund is usually issued within a few weeks of filing
Beware of "tax refund" companies that submit refund claims on your behalf for a significant fee — you can do this yourself for free directly with HMRC.
Your data rights with HMRC and banks
Under UK GDPR, you have the right to:
- Request a copy of all personal data held about you by HMRC, banks and financial institutions (Subject Access Request)
- Have inaccurate data corrected
- Object to processing in certain circumstances
Submit a Subject Access Request to HMRC at gov.uk. Banks must respond within 1 month. HMRC responses may take longer for complex requests. There is no charge.
1
Check your tax code on your payslipCompare it to your personal allowance. If it's wrong (especially if it says BR or 0T with no reason), contact HMRC on 0300 200 3300.
2
Register for a personal tax accountgov.uk/personal-tax-account lets you view your tax records, update your information, claim refunds and check your State Pension forecast.
3
File Self Assessment on timeRegister by 5 October after the end of the tax year you need to report. File and pay by 31 January (online). Late filing and payment both attract automatic penalties.
4
Keep financial records for at least 6 yearsHMRC can investigate up to 6 years back for careless errors. Keep bank statements, payslips, invoices and receipts.
5
Claim any PAYE overpayment within 4 yearsDon't let overpaid tax sit with HMRC — claim it back through your personal tax account or by contacting HMRC directly.
6
Be wary of tax refund companiesThey often charge 30–40% of your refund as a fee. You can claim refunds directly from HMRC for free.
Frequently asked questions
How do I know if I've overpaid tax?
Check your P60 (end of year summary from your employer) against your expected income tax. Use the HMRC income tax calculator at gov.uk, or log into your personal tax account to see HMRC's view of your liability.
What happens if I miss the Self Assessment deadline?
An automatic £100 penalty applies immediately after 31 January. Further daily penalties of £10/day apply after 3 months (up to £900), and then percentage-based penalties after 6 and 12 months. Always file even if you can't pay — penalties for non-filing are often worse than for non-payment.
Can HMRC access my bank accounts?
HMRC has powers to obtain information from banks, though this is used for investigation purposes rather than routine monitoring. If HMRC opens a compliance check into your affairs, your bank may be required to provide records.
What is a P800 tax calculation?
A P800 is a notice from HMRC telling you that you've either paid too much or too little tax. If it shows an underpayment, HMRC usually collects it via your PAYE code the following year (if under £3,000). If it shows an overpayment, a refund will be issued.
Can I deduct working from home costs?
If you work from home and your employer doesn't reimburse you, you may be able to claim a flat rate of £6/week via your personal tax account — or a higher amount if your actual additional costs exceed this. HMRC guidance on homeworking expenses is at gov.uk.
I've received a letter saying I owe HMRC money — is it real?
Always verify by logging into your personal tax account or calling HMRC directly on 0300 200 3300. Do not click links in emails or texts claiming to be from HMRC — HMRC does not send refund or debt notifications by email or text. Scam reports can be made to Action Fraud.
What is Gift Aid and how does it benefit me?
Gift Aid allows charities to reclaim basic rate tax on your charitable donations. If you're a higher or additional rate taxpayer, you can also claim back the difference between your tax rate and the basic rate via Self Assessment.
📞 Free help and support
HMRC general enquiries: 0300 200 3300
HMRC Self Assessment: 0300 200 3310
Citizens Advice: 0800 144 8848
Tax Aid (low income): 0345 120 3779
⚠ Important disclaimer: This guide covers income tax and financial rights across the UK as at July 2026. General legal information only — not legal advice. Verify with ACAS, GOV.UK or Citizens Advice before acting. ukworkrights.co.uk — Not a law firm.