HMRC Audit Thresholds & The 'Just and Reasonable' Rule
Paragraph 4 of Schedule 4 to the Finance Act 2003 requires that consideration must be apportioned on a 'just and reasonable' basis.
HMRC Stamp Taxes compliance teams operate risk-scoring algorithms on all Form SDLT1 filings. Transactions where chattels apportionment causes the taxable land consideration to sit exactly at £250,000, £500,000, or £925,000 are flagged for scrutiny.
For example, allocating £15,000 of chattels on a £265,000 purchase to declare a land price of £250,000 immediately alerts HMRC, because it eliminates the higher tax band. In such cases, HMRC will request photographic proof of condition and age for every item.
| Apportionment Percentage | Typical Cash Value (£450k Property) | HMRC Scrutiny Profile | Recommended Evidence Standard |
|---|---|---|---|
| Under 1.5% | £1,000 – £6,750 | Low Risk Profile | Signed Law Society TA10 form and agreed itemised list |
| 1.5% to 3.0% | £6,750 – £13,500 | Moderate Compliance Attention | TA10 schedule with second-hand valuations and photos |
| 3.0% to 5.0% | £13,500 – £22,500 | High Scrutiny Threshold | Independent inventory clerk / surveyor report recommended |
| Over 5.0% | Exceeding £22,500 | Critical Audit Trigger | Specialist RICS contents appraisal and purchase receipts required |
Mortgage Fraud & Conveyancer Legal Responsibilities
Conveyancers and solicitors are under a professional duty to both buyer and mortgage lender under the SRA Standards and Regulations and Rule 6.3 of the UK Finance Handbook.
If a solicitor suspects the parties are inflating chattels values to evade SDLT, they are legally prohibited from submitting the fraudulent return. Doing so exposes the firm to disciplinary action, strike-off, and criminal charges under the Fraud Act 2006.