Corporation tax accountant in Harrow

From 1 April 2023 the small profits rate is 19% on profits up to £50,000 and the main rate is 25% on profits over £250,000. Between £50k and £250k a marginal relief slice applies, giving an effective rate that rises smoothly from 19% to 25%. The thresholds are divided by the number of associated companies, so a group of three Ltds shares £16,667 / £83,333 thresholds - not £50k / £250k each. We map your group structure carefully to avoid surprise tax bills.

Full Expensing - 100% relief on new qualifying plant and machinery. Annual Investment Allowance - £1m of relief on qualifying capex. R&D tax credits - even modest software, process or product development can qualify (we'll tell you honestly if it doesn't). Structures and Buildings Allowance - 3% straight-line for commercial property fit-out. Patent Box - 10% effective rate on profits from patented inventions. We review every client's eligibility annually.

Your CT600 is due 12 months after year-end, with the tax payable 9 months and 1 day after year-end (or in quarterly instalments for large companies). Late filing = £100 penalty rising to £1,000+ for repeat offenders. Late payment interest is currently 7.75%. We file early - usually within 4 weeks of receiving your year-end figures - so you have plenty of time to plan the payment. If HMRC opens a CT enquiry, we handle the entire process on your behalf under our Fee Protection cover.