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Self BuildersConversion VATMissing Conversion Invoices: Can I Still Make a VAT431C Claim?
Conversion VAT — HMRC Notice 708

Missing Conversion Invoices: Can I Still Make a VAT431C Claim?

You can only include expenditure in a VAT431C claim where you have a valid VAT invoice or VAT receipt showing the amount of VAT charged. HMRC does not accept bank statements, credit card statements, or estimates in place of invoices. If invoices are missing, you should contact suppliers to request duplicates — but you cannot claim for amounts you cannot evidence with a valid VAT document.

100%

Why this matters

Any line item without a valid VAT invoice is 100% excluded from your claim. On a project where £5,000 of material receipts were lost, that is £1,000 in unrecoverable VAT — simply because the paperwork was not kept.

The key distinctions

Valid evidence — original VAT invoice

A full VAT invoice showing the supplier's name, VAT number, date, description, net amount, VAT rate and VAT amount. This is the gold standard for a VAT431C claim.

Valid evidence — VAT receipt (simplified invoice)

For purchases under £250, a VAT receipt (till receipt or simplified invoice) showing the supplier's VAT number and the VAT-inclusive price is acceptable.

Not valid — bank or card statements

HMRC does not accept bank statements or credit card statements as evidence of VAT paid. The statement must be accompanied by the VAT invoice or receipt.

Recoverable — duplicate invoices from suppliers

Contact suppliers directly and ask for duplicate invoices or receipts. Most builders' merchants and VAT-registered contractors can reprint historical invoices. Document your request and their response.

Practical checklist

  • Audit your invoice file now — identify all missing documents before your deadline
  • Contact every supplier with a missing invoice and request a duplicate in writing
  • Keep records of your attempts to recover missing documents
  • Check whether any purchases were through an online account (Screwfix, Toolstation, Travis Perkins) — invoices may be available online
  • For contractor invoices, check email records — many contractors send PDF invoices by email
  • Do not include any items in your claim where you cannot produce a valid VAT invoice or receipt
  • Start collecting and filing invoices from day one of your project — do not wait until completion

HMRC notice references

HMRC VAT431C notesEvidence requirements — invoices and receipts
HMRC Notice 700 Section 16VAT invoices — requirements

VATBuild is not affiliated with HMRC. References to HMRC publications are for informational purposes. Always consult a qualified tax adviser before submitting a reclaim.

How VATBuild helps

What VATBuild checks for this situation

VATBuild flags each invoice for completeness — checking that VAT numbers are present, amounts are clearly stated, and that the document meets HMRC's invoice requirements. Invoices that are missing key fields are flagged for review before your claim deadline, giving you time to request corrected or duplicate documents from suppliers.