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Tax: questions and answers

Income tax, tax codes, Council Tax and claiming back overpaid tax. Clear answers to the tax questions people ask most, written in plain English and checked against official sources. 19 answers so far.

Fact-checked against official sources such as GOV.UK, HMRC and the IRS · Updated 6 October 2026

United Kingdom 10

  1. How much tax will I have to pay in the UK?

    In 2026/27 most UK employees pay no Income Tax on their first £12,570, 20% up to £50,270 and 40% up to £125,140, plus 8% National Insurance on most pay, so a £30,000…

  2. Can you claim back overpaid tax if you retire part way through the tax year?

    Yes: if you've retired with no workplace pension and only the State Pension, you can claim overpaid PAYE during the tax year online or on form P50, while anyone getting…

  3. Do I have to pay Council Tax if I rent a room?

    Usually not: if you rent one room in a shared house or HMO, or live as a lodger with your landlord, the law makes the landlord liable for Council Tax; you'd normally…

  4. How do I read my tax code notice and check it's right?

    Your tax code notice starts with the £12,570 Personal Allowance, takes off untaxed income such as savings interest or State Pension and any benefits or debts, and turns…

  5. What tax date applies to fund distributions?

    The tax date generally follows the fund’s defined distribution date, not simply the day cash appears in your bank. Equalisation is a separate capital component, so use…

  6. Is a Council Tax overpayment the same as a benefit overpayment?

    A Council Tax bill is not itself a social-security benefit overpayment. Council Tax Reduction is a separate local scheme, and an overpayment of that reduction can be…

  7. How does savings interest affect UK tax in 2026/27?

    For 2026/27, ordinary savings interest is generally taxed at the normal Income Tax rates after the relevant savings allowances. The Personal Savings Allowance is £1,000…

  8. How do I get a UK tax refund or fix the wrong tax code?

    Start with HMRC, rather than a paid tax-rebate company. Check your tax code and Tax Account first, then use HMRC's refund process if you have actually overpaid. For…

  9. How can I check how much of my ISA allowance I have used?

    For 2026/27, the overall ISA subscription limit is £20,000. HMRC receives subscription data from ISA managers, but there is no simple public live total across all…

  10. How do I contact HMRC about a tax refund?

    HMRC can issue tax refunds in different ways, including through PAYE, bank payment or cheque, depending on the tax and circumstances. Check the underlying HMRC record…

United States 6

  1. Does a $10,000 cash car payment trigger an IRS Form 8300?

    A US car dealer generally must file Form 8300 when it receives more than $10,000 in reportable cash in one transaction or related transactions. The form is an…

  2. How should you fill out a W-4 for a second job?

    For a US employee with two jobs, the W-4 should reflect the combined income from the jobs so withholding is closer to the eventual tax bill. For two jobs with similar…

  3. Where do you report a US lottery win if you live in one state and bought the ticket in another?

    For US federal tax, lottery winnings are taxable and reported on your federal return. State filing is separate: your resident state may tax the winnings, and the state…

  4. Does a large capital gain push you into a higher US tax bracket?

    Yes, a large capital gain can increase your taxable income and change which rate applies to part of the gain. Long-term gains generally use a separate preferential rate…

  5. What should I do if information is missing from my US tax return?

    If a US tax document or other information is missing, do not invent a number. Check IRS records, contact the payer, reconstruct figures from supporting records when…

  6. What happens if you stop paying US property taxes?

    Unpaid property taxes can lead to penalties, interest, a tax lien and eventually enforcement such as a tax sale or foreclosure, depending on the state and local rules…

Worldwide 3

  1. Why does my tax refund look different from what I expected?

    A UK tax refund can differ from your estimate because HMRC calculates tax from your actual reported income, allowances, deductions and tax already paid. For 2026/27…

  2. Is my tax correct for the 2026/27 tax year?

    For 2026/27, check the income and allowances HMRC holds, then compare your tax code with your payslip. The standard Personal Allowance is £12,570, but multiple incomes…

  3. Can I use Excel for personal tax records in the UK?

    Yes, an Excel spreadsheet can be useful for personal tax record-keeping, but if Making Tax Digital for Income Tax applies to you, spreadsheets alone are not enough to…

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General information, not personal financial advice. How we check facts.