Business Tax Hub
Your comprehensive resource for UK business tax. Access free calculators, current rates, key deadlines, and expert guidance to help you manage your company's tax obligations efficiently.
Business Calculators
Free, HMRC-aligned calculators updated for the 2025/26 tax year.
Corporation Tax
Calculate your company's CT liability including marginal relief, effective rate, and payment deadlines.
Open calculatorDividend vs Salary
Find the optimal split between salary and dividends to minimise your overall tax bill.
Open calculatorEmployer Cost
Work out the true cost of employing someone including NI, pension, and apprenticeship levy.
Open calculatorVAT Calculator
Calculate VAT on goods and services, compare flat rate vs standard scheme, and check thresholds.
Open calculatorSole Trader vs Ltd
Compare operating as a sole trader versus a limited company and see which saves you more tax.
Open calculatorR&D Tax Credits
Estimate your R&D tax credit claim under the merged RDEC scheme for qualifying expenditure.
Open calculatorBusiness Rates
Estimate your business rates bill including small business rate relief and other reliefs.
Open calculatorPayroll
Run payroll calculations for your employees including PAYE, NI, student loan, and pension.
Open calculatorCapital Gains Tax
Calculate CGT on property, shares, and other assets with reliefs and annual exemption.
Open calculatorStamp Duty
Calculate SDLT on residential and commercial property purchases including surcharges.
Open calculatorMileage
Calculate HMRC-approved mileage allowance for business journeys in cars, bikes, and bicycles.
Open calculatorInheritance Tax
Estimate IHT liability on your estate including nil-rate band, RNRB, and gift exemptions.
Open calculatorCapital Allowances
Calculate AIA, writing-down allowances, and first-year allowances on business assets.
Open calculator| Rate Band | Rate | Profit Threshold |
|---|---|---|
Small Profits Rate | 19% | Up to £50,000 |
Marginal Relief | 19% – 25% | £50,001 – £250,000 |
Main Rate | 25% | Over £250,000 |
Associated companies: If you control multiple companies, the £50,000 and £250,000 thresholds are divided equally among all associated companies (including dormant ones in some cases). For example, two associated companies reduce the lower limit to £25,000 and the upper limit to £125,000 each.
| Obligation | Deadline |
|---|---|
Corporation Tax payment due | 9 months + 1 day after period end |
CT600 Company Tax Return filing deadline | 12 months after period end |
VAT return and payment (quarterly filers) | 7th of 2nd month after quarter end |
Self Assessment tax return and balancing payment | 31 January |
PAYE RTI (Real Time Information) submission | On or before payment |
P11D expenses and benefits filing deadline | 6 July |
Annual accounts filing at Companies House | 9 months after year end |
Late filing and late payment both carry automatic penalties from HMRC. Corporation tax late payment also accrues interest. Set up reminders well in advance of each deadline to avoid unnecessary charges.
Sole Trader vs Limited Company
Sole Trader
- Simple setup -- no Companies House registration
- Minimal admin and reporting requirements
- Keep all profits after tax
- Unlimited personal liability for business debts
- Pay income tax and Class 2/4 NI on all profits
Limited Company
- Limited liability -- personal assets protected
- Corporation tax at 19-25% (often lower than income tax)
- Tax-efficient extraction via salary + dividends
- More admin: annual accounts, confirmation statement, CT600
- Director responsibilities and fiduciary duties
When Should You Incorporate?
There is no universal answer, but incorporating typically becomes advantageous when:
- Your taxable profits consistently exceed £30,000 - £40,000 per year
- You want to retain profits in the business for reinvestment or growth
- You need limited liability protection (e.g. you work with large contracts or in higher-risk sectors)
- Clients or suppliers prefer or require you to operate as a limited company
Key Director Responsibilities
Reg. 07380272 · England & Wales · Est. 2010
Need help optimising your corporation tax position?
Our partner accountants can review your company structure, identify reliefs, and ensure you are paying the right amount of tax.