Self Assessment tax returns —
done right, every year.

You must file if you are self-employed (even part-time), a landlord earning over £1,000 in rental income, a company director, an employee earning over £100,000, or if you have untaxed income such as savings interest, dividends, or foreign income. If you are unsure, a quick call with us will confirm whether you need to file.

The deadline for online filing is 31 January after the end of the tax year. So for the 2024/25 tax year (ending 5 April 2025), the deadline is 31 January 2026. Payment of any tax owed is also due on 31 January, with a second payment on account due by 31 July.

Allowable expenses include: office costs (stationery, phone bills), travel costs (fuel, parking, train fares — not commuting), clothing (uniforms or protective gear), staff costs, stock and materials, financial costs (bank charges, insurance), advertising and marketing, and training. We review every expense line to ensure you claim everything you are entitled to.

Missing the 31 January deadline triggers an automatic £100 penalty, even if you owe no tax. Further daily penalties of £10 apply after 3 months (up to £900), and 5% surcharges apply to unpaid tax after 30 days, 6 months, and 12 months. It is always cheaper to file late than not to file at all.

Making Tax Digital for Income Tax (MTD for ITSA) requires self-employed individuals and landlords earning over £50,000 to submit quarterly digital updates to HMRC from April 2026 instead of an annual return. If you are above that threshold, you need to be on MTD-compatible software now. We are already MTD-ready — read our full guide on MTD.

If you are UK tax resident, you must declare your worldwide income on your UK Self Assessment — including any Spanish rental income, dividends, or other foreign earnings. The UK–Spain Double Taxation Treaty prevents you paying full tax twice, but the disclosure obligation exists regardless. We specialise in exactly this situation and handle both sides for many clients.

We send you a simple checklist each year. Typically we need: your P60 or P45 (if employed), invoices and business bank statements (if self-employed), rental income and mortgage statements (if a landlord), details of any savings interest, dividends, or pension income, and records of any capital disposals. We manage the HMRC relationship directly so you do not need to deal with them at all.

Yes. Our Self Assessment service is priced at a fixed fee agreed upfront — no surprises, no hourly billing. The fee depends on the complexity of your return (number of income sources, capital gains, foreign income etc). We confirm the cost before we start.