Knowledge Bank

R&D tax relief for software & SaaS companies: what qualifies, what HMRC treats as routine, and which costs (including cloud) you can claim.

Since 18 May 2026 your R&D tax adviser must be registered with HMRC. Here’s what the rule means and what to check before you let anyone file your claim.

A guide to R&D tax relief for engineering firms: which projects and costs qualify, how the merged scheme and ERIS work, and how to make a claim that survives HMRC.

HMRC’s targeted advance assurance pilot (from 18 May 2026) lets eligible SMEs get HMRC’s view on up to 2 high-risk areas of an R&D claim before filing. Here’s how.

HMRC has moved R&D enquiries from ISBC to its WMBC directorate in 2026. Here’s what the change means for your claim — and how to prepare.

If your company has a December 2025 year-end, you must submit an R&D Claim Notification Form to HMRC by 30 June 2026 — or lose the ability to claim. Here’s what to do.

Compare RDEC and ERIS for large groups: eligibility, tax treatment, cash benefit and when loss‑making SMEs may prefer ERIS.

2026 guide to HMRC R&D processing times by claim type, causes of delays and practical steps to speed up your claim.

Avoid five RDEC claim mistakes: wrong scheme, ineligible costs, subcontractor/EPW errors, poor time apportionment and CT600 mismatches.

Five essential records—technical docs, time logs, cost breakdowns, contracts and specialist support—to support R&D tax relief claims.