Tax and Legal

Cleaning your VAT records: what to keep

By Walid Mograbi · 2026-06-15 · 2 min read

A practical VAT checklist for UK businesses to prepare a complete tax file, reduce missing-document risks, and speed up HMRC-facing tasks.

Cleaning your VAT records: what to keep

Use this lesson as a focused audit checklist, not a broad tax strategy. It covers only the recordkeeping rules you need to keep your UK VAT file review-ready and avoid document gaps during a check.

1) When VAT registration is required

Before you build your file, confirm the trigger point:

• If your **taxable sales exceed £90,000** in the last 12 months, VAT registration is required.
• If you **expect** your taxable sales to exceed £90,000 within the **next 30 days**, registration is also required within the HMRC timeframe.

2) What to keep from the moment you register

From the day you become registered, keep a copy of:

• Every sales invoice you issue.
• Every purchase invoice you receive.
• Even invoices that are cancelled or corrected later.
• The VAT ledger showing:
• VAT on sales (output VAT)
• VAT on purchases (input VAT)
• VAT balance due
• VAT reclaim due

Do not treat a corrected or cancelled document as optional; keep it to preserve the full transaction trail.

3) How long records must be kept

The core retention rule is:

• **6 years** as the standard period.
• **10 years** when you use **OSS** (VAT One Stop Shop) or **MOSS** (VAT Mini One Stop Shop).

4) Quick three-point pre-audit checklist

• [ ] Check registration condition and timing (90,000 threshold and 30-day rule).
• [ ] Confirm there is at least one copy of every issued and received invoice.
• [ ] Verify retention period is set to 6 years, or 10 years for OSS/MOSS filings.

5) Why this checklist helps

This list gives you faster control over your VAT file. If documents are complete and organized by requirement, you reduce delays in claims, limit preparation time, and avoid disputes caused by missing records.

6) Warning to apply

The rules above are based on HMRC guidance and apply to the UK context. Other countries may use different thresholds, retention periods, or record formats. Always check local tax authority rules first.

7) Sources for this lesson

• HMRC – Register for VAT: when to register
• HMRC – Charge, reclaim and record VAT: keeping VAT records