# Corp Tax Calculator

> A United Kingdom corporation tax calculator, and an independent record of what UK R&D tax relief firms charge, quoted verbatim from each firm's own page and dated. Fees are given as the percentage of the tax benefit, the minimum fee and the basis charged on. The site is not a tax adviser.

## Key facts

- The median published fee across 3 UK R&D tax relief firms with a verified figure is 15% of the tax benefit (as of 2026-09-10).
- Every fee is quoted verbatim from the firm's own published page, with the date it was read; a firm that publishes none is recorded as publishing none.
- From 18 May 2026 anyone who interacts with HMRC on a client's tax affairs must be registered with HMRC, which reaches R&D advisers directly.
- The site publishes no view on whether a project qualifies for relief and gives no tax advice.

## Key pages

- [UK R&D Tax Relief Fee Record](https://corptaxcalculator.co.uk/fees/): published fees, minimum fees and charging bases, verified verbatim, with CSV downloads
- [Corporation tax services](https://corptaxcalculator.co.uk/corporation-tax-services/): guide built on published corporation tax rules and firms' published fees
- [Corporation tax advice](https://corptaxcalculator.co.uk/corporation-tax-advice/): guide built on published corporation tax rules and firms' published fees
- [SIPP providers](https://corptaxcalculator.co.uk/sipp-providers/): guide built on published corporation tax rules and firms' published fees
- [Annuity cost](https://corptaxcalculator.co.uk/annuity-cost/): guide built on published corporation tax rules and firms' published fees
- [Retirement planning services](https://corptaxcalculator.co.uk/retirement-planning-services/): guide built on published corporation tax rules and firms' published fees
- [Paying into a SIPP and a company pension](https://corptaxcalculator.co.uk/can-i-pay-into-a-sipp-and-company-pension/): guide built on published corporation tax rules and firms' published fees
- [Stamp duty](https://corptaxcalculator.co.uk/stamp-duty/): guide built on published corporation tax rules and firms' published fees
- [Inheritance tax](https://corptaxcalculator.co.uk/inheritance-tax/): guide built on published corporation tax rules and firms' published fees
- [Redundancy and notice](https://corptaxcalculator.co.uk/redundancy/): guide built on published corporation tax rules and firms' published fees
- [R&D tax relief specialists](https://corptaxcalculator.co.uk/fees/rd-tax-relief-specialists/): firms handling this relief, with their published fees
- [Firm record](https://corptaxcalculator.co.uk/vendors/): per-firm published fees, quotes, sources and dates
- [What will my company owe?](https://corptaxcalculator.co.uk/quote/): enter profit, period and associated companies; the calculator returns the corporation tax due at the published rates and shows the arithmetic

## Data

- Download (CSV, vendor pricing index): https://corptaxcalculator.co.uk/fees/uk-rd-tax-relief-fee-record.csv
- Download (CSV, R&D tax relief specialists coverage): https://corptaxcalculator.co.uk/fees/rd-tax-relief-specialists.csv
- Methodology: Every figure is a fee the firm publishes on its own page, re-fetched and matched verbatim, then hash-pinned; the quote and its date travel with the cell. A firm naming no fee is listed saying so, never with an estimate. The ranking figure is the share of the benefit taken at the first band printed; the minimum fee sits beside it, because on a small claim the floor is the price.
- Source: Alexander Clifford partner programme page: https://alexanderclifford.co.uk/partner-programme/
- Source: ForrestBrown R&D tax credits page: https://forrestbrown.co.uk/rd-tax-credits-explained/
- Source: Gateley Capitus capital allowances page: https://gateleyplc.com/gateley-capitus/
- Source: GrantTree R&D tax credits page: https://granttree.co.uk/rd-tax-credits/
- Source: Leyton UK R&D tax credits page: https://leyton.com/uk/services/rd-tax-credits/
- Source: Sleek UK R&D tax credits page (when the fee falls due): https://sleek.com/uk/rd-tax-credits/
- Source: Azets UK capital allowances page: https://www.azets.com/en-uk/services/tax/capital-allowances/
- Source: EmpowerRD pricing page: https://www.empowerrd.com/pricing/
- Source: Myriad Associates pricing page (fixed fee alternative): https://www.myriadassociates.com/pricing/rd-tax-credits-pricing/
- Source: Tax Cloud pricing page (second band): https://www.taxcloud.co.uk/pricing/

## Citation

Cite as: "Corp Tax Calculator UK R&D Tax Relief Fee Record", https://corptaxcalculator.co.uk/fees/ (updated 2026-09-10).

## About

- Operated by Joseph Ellul. Contact: enquiries@corptaxcalculator.co.uk
- By submitting you agree Corp Tax Calculator shares your details with R&D tax and corporation tax firms who may contact you.