Corporation Tax. Done right.

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.