A mortgage that reads your accounts fairly.
As a sole trader you’re assessed on net profit, so the right lender — and the right read of your SA302s — makes a real difference to what you can borrow.
How sole trader income is assessed
Lenders assess sole traders on net profit — your income after allowable expenses, as shown on your SA302 and tax calculation. They typically average the last two years (or use the latest year if it’s lower), then apply a multiple of around 4.5×.
Unlike a limited company contractor, you can’t usually lean on contract-based underwriting, because your tax is based on profit rather than a day rate billed through a company. That makes how your accounts are prepared — and which lender reads them — especially important.
How many years do you need?
- Two years is the common benchmark, averaged or based on the lower year.
- One year is accepted by a smaller group of lenders where the figures are sound.
- Rising profits can sometimes be assessed on the latest, higher year with the right lender.
The expenses trade-off
Because lenders use net profit, the expense claims that cut your tax bill also cut the income they’ll lend against. In the year or two before buying, it’s worth planning this with your accountant — balancing tax efficiency against borrowing power. See why the SA302 matters and the documents checklist.
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Lenders for the self-employed — a selection
Sole trader mortgages, answered
How is a sole trader’s income assessed for a mortgage?+
On net profit — the figure after allowable expenses on your SA302 and tax calculations. Lenders usually average the last two years, or take the latest year if it’s lower, then apply an income multiple of around 4.5×.
Can I get a mortgage with one year of accounts as a sole trader?+
Some lenders will lend on a single year’s SA302 where the figures are sound, though the pool is smaller. A strong, stable first year and a clean credit record help. A broker knows which lenders accept one year.
Why can’t I use contract-based underwriting like a limited company contractor?+
Contract-based assessment is built around a day rate billed through a company or umbrella. As a sole trader you’re taxed on net profit, so lenders assess you on that — though if you have a clear day rate, some may still consider it.
Do large expenses hurt my borrowing?+
They can. Because lenders use net profit, heavy expense claims reduce the income they’ll lend against. It’s worth planning the year or two before applying with your accountant, balancing tax efficiency against borrowing power.