How lenders may assess sole-trader mortgage income
For a sole trader, turnover is not the same as earnings: business expenses reduce profit. Start with the evidenced annual income figure the lender asks for, often taxable business profit or an appropriate figure from your tax calculation. An SA302 total can contain income from more than one source. Do not add the same income again or substitute sales, an unverified forecast or your after-tax take-home figure.
This self-employed mortgage income calculator offers latest-year, two-year average, three-year average and lower-of-latest-and-average choices. With two or three years selected, the starting method is a two-year average. The lower method uses all entered years. None represents every lender's policy: check the evidence basis before making decisions.
SA302, tax-year overviews and accounts
GOV.UK confirms that a tax calculation (SA302) and tax-year overview can be used as evidence of self-employed earnings. They are different documents: one shows the calculation, the other the tax-year record. Confirm the lender accepts your version, including self-printed documents. A tax calculation alone is not a mortgage approval.
GOV.UK says you can obtain SA302 evidence for the last four years once you have submitted your Self Assessment return, and a tax-year overview for any year. You cannot print the documents until 72 hours after submitting the return. If you or your accountant filed using commercial software, print the tax calculation from that software and obtain the tax-year overview from your HMRC online account. Check that your lender accepts self-printed documents. These retrieval periods are not a requirement that every lender needs four years of accounts.
Use our SA302 and tax-year overview preparation guide for document pairing and questions to ask your provider.
Evidence checklist
- SA302 or tax calculation and the corresponding tax-year overview.
- Business accounts and, where requested, accountant-prepared information.
- Business and personal bank statements.
- Evidence of deposit and its source.
- Identity and address evidence.
- Employment and other income evidence for a joint applicant.
This is a preparation checklist, not a fixed lender requirement. Different lenders ask for different documents and periods; check directly with the lender or a qualified mortgage adviser.
One, two or three years — and changing profits
Many lenders commonly ask for two or three years of returns or accounts. One year's evidence is enough to run a planning illustration here, but does not establish that a lender will accept it. Rising profit does not mean the latest year will be counted in full. Declining profit can make an average too optimistic; a lender may use a lower figure, request more evidence or reach a different decision.
Joint applications and company directors
A joint application combines the two entered income bases, but a lender also considers both applicants' commitments and circumstances. Employed income here is gross salary plus any other evidenced annual income; lenders can discount bonuses, variable pay or other sources. Do not add a salary twice when it already appears in another figure.
For a limited company director, choose the salary-plus-dividends mode for either applicant. Enter personal gross salary and dividends received separately for each evidenced year; the engine adds them before applying your chosen averaging method. Company profit can be relevant under other lender criteria, but this tool does not calculate dividends or retained-profit eligibility, and company turnover is not personal income. Confirm the method with the provider. Our sole trader vs limited company calculator compares tax, not mortgage eligibility.
Deposit, property price and loan-to-value
Loan required = target price − deposit. LTV = loan required ÷ property price × 100. For example, a lower percentage simply means more of the price is funded by your deposit. LTV thresholds such as 60%, 75%, 80%, 85%, 90% and 95% describe ratios, not approval rules or product prices. A 100% LTV illustration is not a claim that a no-deposit product exists for you.
Without a target price, each scenario shows borrowing plus deposit as an illustrative property budget. This excludes stamp taxes, legal and valuation fees, moving costs and other buying expenses. Keep money for those separately; see GOV.UK's buying-a-home guidance.
Affordability is more than an income multiple
MoneyHelper describes borrowing as typically capped around 4.5 times annual income, but most people may be offered less. The 3.5×, 4× and 4.5× rows are planning scenarios, not offers. The 5× row is a higher illustration some applicants or lenders may not qualify for, not a generally available normal cap.
FCA rules require lenders to assess affordability, including income and expenditure and likely future interest-rate increases where applicable. This calculator does not perform that regulated assessment. Commitments are shown next to repayments, not turned into an invented affordability adjustment.
No disposable-income figure is shown: these inputs use gross evidenced annual income and do not establish your monthly take-home, tax, living costs or all household spending. Use the self-employed tax calculator and tax set-aside calculator for business tax planning, then budget for all your spending separately.
Repayment and stress-test methodology
For a repayment mortgage, monthly payment = L × r ÷ (1 − (1 + r)−n), where L is the loan, r is annual interest divided by 12 and 100, and n is years × 12. At zero interest it is simply L ÷ n. The calculation assumes a constant rate and monthly capital-and-interest payments; no fees, insurance, interest-only borrowing, daily-interest detail or rate changes are modelled.
The adjustable planning stress rate starts 3 percentage points above the default illustrative rate. It remains separately editable if you change the main rate. It must not be lower than the main rate. Neither rate is a quote or a prescribed lender/FCA test, and a longer term can mean paying more interest overall.
Worked examples from the calculator
All use two-year average self-employed income, a 25-year term and 5% illustrative rate. Figures below are calculated by the same engine, not lender quotes.
| Example | Income evidence (latest / prior) | Combined basis | 4.5× illustration | Target loan / LTV | Monthly payment |
|---|---|---|---|---|---|
| Rising sole-trader income | £50,000.00 / £40,000.00 | £45,000.00 | £202,500.00 | £200,000.00 / 80.0% | £1,169.18 |
| Declining sole-trader income | £30,000.00 / £50,000.00 | £40,000.00 | £180,000.00 | £180,000.00 / 81.8% | £1,052.26 |
| Joint with employed partner | £50,000.00 / £40,000.00 + £30,000.00 salary | £75,000.00 | £337,500.00 | £280,000.00 / 80.0% | £1,636.85 |
The declining example deliberately shows why a simple average needs caution: it is higher than the latest income. Try the lower method and discuss evidence with the lender. None of these examples indicates approval.
Frequently asked questions
How much can I borrow if I am self-employed?
There is no guaranteed amount. Income multiples provide a starting illustration, but lenders assess evidenced income, outgoings, debts, credit history, age, term and the property. MoneyHelper describes around 4.5 times annual income as a typical cap and says most people may be offered less. This calculator is planning only.
Is this an SA302 mortgage calculator?
You can use appropriate evidenced income from a tax calculation or SA302, but SA302 is a document, not a lending formula. Tax-year overviews may also be requested. Check which income figure and documents your lender will accept; do not add income twice if it is already included in an SA302 total.
Can I estimate borrowing with only one year of accounts?
Yes, this tool allows one year, with a warning. Many lenders commonly ask for two or three years of accounts or returns, and requirements vary. An illustration from one year does not establish that a lender will accept your application.
Do lenders average two or three years of self-employed income?
Some may use an average, others the latest year or a lower figure, depending on their criteria and your circumstances. The choices here are user-selected planning methods, not universal lender rules. Two years defaults to a two-year average; you can choose a lower basis.
What happens if my profits are declining?
A fall between the entered years triggers a warning. Lenders may investigate the trend and use a lower income figure or ask for more information. A simple average can hide a decline, so try the lower-of-latest-and-average method too.
Does the calculator show whether I am eligible?
No. It does not check eligibility, credit history, lender criteria or regulated affordability. Being within an illustrative multiple is not approval. It is not a lender quote, mortgage offer, Agreement or Decision in Principle, regulated advice or a borrowing guarantee.
Is five times income generally available?
No such claim is made here. Five times income is a higher illustrative scenario that some applicants or lenders may not qualify for, not a normal cap or promise. MoneyHelper's common upper planning reference is around 4.5 times income, and many people may be offered less.
Can limited company directors use this?
Yes, select the company-director mode and enter evidenced personal gross salary and dividends received separately for each year. The planning method uses their annual sum, but you must confirm the lender's method. Some lenders may consider company profits instead. Do not enter company turnover or retained profits; company-profit-based assessment is not modelled.
Does the stress rate match the lender's test?
No. It is an adjustable planning scenario, initially three percentage points above the default illustrative rate. It is not an exact FCA-mandated or lender-mandated test. Real lender affordability checks are more detailed and may use different assumptions.
Official sources and review
Prepared by SoloCalc. Guidance reviewed 23 October 2026 against the sources below. The formulas are deterministic planning maths, not lender criteria or regulated advice. No FCA approval, mortgage-adviser credentials or lender endorsement is claimed.
- MoneyHelper: how much can you afford to borrow?
- MoneyHelper: how to apply for a mortgage
- GOV.UK: get your SA302 tax calculation
- GOV.UK: buying a home — money and tax
- FCA: mortgage affordability rules (MCOB 11)
Related SoloCalc tools
- Self-employed tax and take-home calculator.
- Tax savings and monthly set-aside calculator.
- Sole trader vs limited company tax comparison.
- Hourly and freelance day rate calculator — plan revenue, not mortgage acceptance.
Results exclude credit checks, detailed household affordability, age and retirement criteria, residency, credit history, property suitability, lender/product rules, specialist borrowing, business valuations and future-income verification. Speak to a qualified mortgage adviser for advice on your circumstances.