Lower your Corporation Tax bill, legally, accurately, on time.
Corporation Tax is the tax every UK limited company pays on its profits, and getting it right takes more than filling in a form. Our corporation tax services cover the whole job, from the CT600 and computations to capital allowances and R&D relief, handled by an ACCA-qualified accountant who knows your numbers. Fixed fees, replies within 72 hours, and no surprises at year-end.
Get your company tax return filed
We prepare and file your full Corporation Tax return (CT600) with HMRC and the accompanying iXBRL-tagged accounts. Corporation Tax is due nine months and one day after your accounting period end, while the return itself is due twelve months after, two different deadlines our corporation tax services manage so neither is missed.
With the small-profits rate at 19% up to £50,000 and the main rate at 25% above £250,000, profits in between are taxed at an effective 26.5% marginal rate. We model where your profits fall, factor in associated companies that lower both thresholds, and time decisions to keep you out of the expensive band.
We claim the £1,000,000 Annual Investment Allowance and 100% full expensing on qualifying new main-rate plant and machinery. We also apply the new 40% first-year allowance and track the main-pool writing-down allowance falling from 18% to 14% from April 2026, sequencing claims to maximise relief. Allowance planning like this runs through all our corporation tax services.
Under the merged R&D scheme we claim the 20% above-the-line expenditure credit (worth roughly 15% net of tax). For loss-making, R&D-intensive SMEs spending over 30% of total expenditure on R&D, we use ERIS, a 186% enhanced deduction with a payable credit of up to 14.5%. We prepare the mandatory additional information form to keep claims compliant.
We use trading losses efficiently, carried back, carried forward, or surrendered as group relief, and plan the most tax-efficient mix of salary and dividends, using the £500 dividend allowance and 2026/27 dividend rates of 10.75%/35.75%/39.35% alongside your Corporation Tax position.
For companies raising capital or rewarding staff, we structure SEIS (£250,000 raise, 50% investor relief), EIS (30% relief) and EMI option schemes, including the 2026 EMI expansion to a £6m company limit, 500 employees, £120m gross assets and a 15-year option life. Correct setup and HMRC advance assurance protect everyone's relief.
You deal with one ACCA-qualified accountant who knows your company and its numbers, not a call centre or a different person each time you ring.
Transparent fixed fees of £99, £199 or £499 depending on your needs, billed on a rolling monthly basis you can cancel anytime. You always know the cost before we start.
Every query gets a substantive answer within 72 hours, so a question about a deadline or a relief never sits unanswered when it matters.
We work directly in Xero, QuickBooks, FreeAgent or Sage, so your bookkeeping and your Corporation Tax return stay in one joined-up picture as part of our corporation tax services, rather than two disconnected systems.
A 30-day money-back guarantee means if we are not the right fit in the first month, you get your fee back, no quibble.
Every accounting period carries two separate deadlines, and they are not the same date. Your tax is due nine months and one day after the period ends. The return itself is due twelve months after, three months later.
Miss the payment date and HMRC charges interest from day one. Miss the filing date and penalties start at £100 and climb. Large companies with profits over £1.5 million pay in quarterly instalments, and associated companies lower that threshold further.
We track every date for you, flag it well in advance, and file directly with HMRC. Date management like this is built into our corporation tax services, so nothing ever slips.
A dormant company may be exempt from filing a CT600 once HMRC has confirmed its status, but its dormant accounts still go to Companies House separately. The duty to file and the tax owed are two different things, so an active company making a loss must still file. We confirm your position with HMRC and keep both obligations covered.
Your accounting profit and your taxable profit are rarely the same number. The calculation bridges the two, adjusting for disallowed costs, capital allowances, and reliefs before the rate applies. Profits up to £50,000 are taxed at 19% and above £250,000 at 25%, with marginal relief tapering the rate in between. We prepare it in full and show how each adjustment lowers your bill. Transparent computations like these are a standard part of our corporation tax services.
See also: company secretarial & confirmation statementsVAT returns and MTD filing
Your company accounts and your CT600 are two separate documents filed with two separate bodies. Company accounts go to Companies House and are public; the CT600 goes privately to HMRC, with iXBRL-tagged accounts attached.
Our corporation tax services prepare and file both under one fixed fee, before either deadline, so you are never caught between two dates.
Most directors only think about it once a year. We work from your live bookkeeping all year round, so by the time the deadline arrives the numbers are already reconciled and the whole job is a formality, not a last-minute scramble.
Once your records are complete, we draft the return, agree the figures with you, and send it to HMRC, usually within five business days. You see the profit and the tax due before anything is filed, and we keep the submission receipt on record.
Filing is only half the job. Each year our corporation tax services review capital allowances, R&D relief, and group structure so a growing company pays no more than it owes. Where a decision affects next year’s bill, we model it before you commit.
Understanding your business needs.
Crafting your custom accounting strategy.
Quick and easy integration.
Consistent monitoring and reporting.
Personal tax returns prepared, optimised, and filed for directors, sole traders, and high earners.
Read moreQuarterly planning calls that surface savings before deadlines, not after.
Read moreFull HMRC representation, documentation, and negotiation when an enquiry lands.
Read moreDisposal planning, reliefs, and computations for property, shares, and crypto sales.
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Profits up to £50,000 are taxed at the 19% small profits rate. Profits above £250,000 are taxed at the full 25% rate. Between those two thresholds you pay 25% with marginal relief, giving an effective rate that climbs from 19% to 25%. Associated companies split those thresholds between them, which catches a lot of group structures off guard.
Your CT600 return must be filed with HMRC within 12 months of your accounting period end. The tax itself is due 9 months and 1 day after the period end, which is earlier than the filing deadline. Companies with profits above £1.5m pay in quarterly instalments, and above £20m they pay even earlier under the very large company rules.
Capital allowances (including the 100% full expensing on qualifying plant and machinery), R&D tax credits, the Patent Box 10% rate, loss reliefs, group relief, and creative industry reliefs all get reviewed every year. Most companies switching to us pick up at least one relief their previous accountant missed. We forecast the saving before doing the work so you see the number upfront.
Yes. Trading losses can be carried back 12 months against profits of the same trade, or carried forward indefinitely against future total profits (subject to the £5m group cap plus 50% restriction on profits above that). For groups, current-year losses can also be surrendered between companies via group relief. We model which option gives you the biggest cash benefit before claiming.
Once we have your complete records, your year-end accounts and CT600 are filed within 5 business days. Corporation tax preparation and filing is included in our Premium and Premium Plus plans (from £199/month), with no separate year-end invoice. Switching mid-year is fine, we handle the handover with your old accountant.
UK limited companies pay Corporation Tax on trading profits, investment income, and chargeable gains. Sole traders and partnerships do not — they pay Income Tax through Self Assessment instead.
Profits up to £50,000 are taxed at 19%. Above £250,000, the rate is 25%. Profits in between attract marginal relief, giving an effective rate of 26.5% within that band. The rate applies to taxable profit — not accounting profit. Capital allowances, R&D credits, and other reliefs reduce the figure before the rate is applied.
Yes, in most cases. The filing obligation and the tax liability are separate things. An active company with a loss still needs to file a CT600 — and filing it correctly lets you carry that loss forward or back against other profits. Dormant companies may be exempt from filing a CT600 if HMRC has confirmed dormancy, but dormant accounts still need to go to Companies House separately. Penalties for late filing start at £100 — even when no tax is owed.
Thirty minutes with an ACCA-qualified accountant. Most owners uncover £1,000-£3,000 in annual savings on the first call. If we are not the right fit, you walk away with a free tax review on the house.
