R&D Tax Tools
Free tools to help UK companies understand their R&D tax relief position, check claim readiness, and meet HMRC deadlines.
R&D Tax Calculator: Merged Scheme vs ERIS (2026 Rates)
Enter your qualifying R&D spend and company profile to get an indicative credit range under the Merged Scheme or the Enhanced R&D Intensive Support scheme.
Open calculator → Decision treeContracted-Out R&D Decision Tree (Merged Scheme)
Step through the HMRC rules for contracted-out R&D to determine which party — customer or contractor — can claim relief on a given project.
Open decision tree → ChecklistAdditional Information Form Pre-Flight Checklist
Verify your R&D claim is ready to submit by working through the mandatory AIF fields that HMRC requires for all claims from August 2023.
Open checklist → Deadline checkerClaim Notification Form Deadline Checker
Check whether your company needs to submit a Claim Notification Form before filing and calculate the relevant deadline for your accounting period.
Open deadline checker →Also useful
Free eligibility checker and indicative recovery calculator — a guided 14-question assessment that returns an indicative R&D credit range and a downloadable PDF summary.