Self-Employed and Buying a House

How lenders view SE income

Lenders price risk based on how stable and verifiable your income is. Self-employed income is treated as riskier than PAYE because it varies and depends on you personally rather than an employer. The headline document is your SA302 — HMRC's tax calculation summary — paired with a Tax Year Overview (which proves the SA302 figure was actually filed and paid). Together these are the lender's 'P60 equivalent' for the self-employed. A rough rule of thumb is borrowing capacity ≈ 4.5× income, but affordability stress tests (rate +1–3%, plus living costs and existing credit) often constrain you sooner. Some lenders go to 5× or 5.5× for high earners or specific professions.

Sole traders — SA302 mechanics

For a sole trader, 'income' is the net profit after expenses on your SA302 — not turnover. So if you have £80,000 of gross income and £25,000 of allowable expenses, the lender sees £55,000. Lenders generally take: • The latest year if income is rising and stable • The average of two years if both are similar • The lower of two years if income has dropped — and they may decline entirely if the drop is sharp COVID-year flexibility: most lenders now ignore the 2020/21 SA302 if it was distorted by lockdowns, provided 2021/22 and later years recovered. You typically need to document the COVID impact in a brief written note.

Ltd directors — salary + dividends + retained profit

Most Ltd directors take a low salary (£12,570) and the rest as dividends. The challenge is that standard lenders treat your income as salary + dividends drawn — so retained profits inside the company do not count. A director earning £180,000 of company profit, taking £12,570 salary + £30,000 dividends and retaining £137,000, looks to most high-street lenders like a £42,570 earner. That caps mortgage capacity at around £190,000 instead of the £600,000 the underlying business could support. Specialist lenders use 'salary + share of net profit' — they ask for company accounts and treat your share of post-tax profit as income whether it was drawn or not. The difference in borrowing capacity is often 2–3×. A self-employed specialist mortgage broker is essential for Ltd directors.

Evidence pack

What lenders typically require for a self-employed mortgage: • Passport / driving licence • Proof of address (utility bill, council tax) • SA302 tax calculations for 2–3 years (download from HMRC online) • Tax Year Overviews for the same years • Company accounts (Ltd directors) for the same period • Accountant's reference — ideally a qualified accountant (CA / ACCA / CIMA) • 3–6 months of personal bank statements • 3–6 months of business bank statements • Deposit evidence and source-of-funds proof Get your accountant onside early. A clean SA302 with a strong reference letter is worth more than aggressive tax optimisation.

The tax-vs-mortgage trap

The brutal arithmetic of self-employed mortgages: every £1 you save in tax via expense claims costs you £4.50 of borrowing capacity (at a 4.5× multiple). Worked example: • Gross income £80,000, expenses £25,000 → net profit £55,000 → tax ≈ £11,432 → borrowing capacity ≈ £247,500 • Gross income £80,000, expenses £15,000 → net profit £65,000 → tax ≈ £15,432 → borrowing capacity ≈ £292,500 Claiming an extra £10,000 of expenses saves about £4,000 of tax but costs £45,000 of borrowing capacity. Critical rule: never falsify or omit allowable expenses on your tax return. That is mortgage fraud and tax evasion. The fix is timing — claim everything you are entitled to but plan WHICH year to claim.

Timing strategy 2–3 years pre-purchase

Plan the run-up to a purchase like a financial event: • Delay large AIA / capital allowance claims until after the SA302 years your lender will scrutinise (you can write down assets later when borrowing capacity matters less) • Use HMRC simplified expenses (mileage at 45p/25p, flat home-office £6/week, vehicle flat rate) for predictability and to avoid lender questions • Smooth income year on year — avoid one big project being recognised entirely in one tax year if it will create a low previous-year figure your lender then averages against • Ltd directors: consider increasing dividends drawn for 2 years pre-purchase, even if it costs a little extra dividend tax, so the standard lender view of your income rises • Avoid changing accountants in the run-up — lenders prefer continuity

SDLT — England & Northern Ireland

Stamp Duty Land Tax bands (April 2025 onward, owner-occupier, not first-time buyer): • £0 – £125,000: 0% • £125,001 – £250,000: 2% • £250,001 – £925,000: 5% • £925,001 – £1.5m: 10% • Above £1.5m: 12% First-time buyer relief: 0% on first £300,000, then 5% to £500,000 (no relief above £500,000). Additional property surcharge: +5% on top of the standard rate for buy-to-let or second home. Non-resident surcharge: +2% on top of the standard rate.

LBTT — Scotland

Land and Buildings Transaction Tax bands (2025/26): • £0 – £145,000: 0% • £145,001 – £250,000: 2% • £250,001 – £325,000: 5% • £325,001 – £750,000: 10% • Above £750,000: 12% First-time buyer relief: 0% up to £175,000. Additional Dwelling Supplement (ADS): 8% on top of standard rates for second homes / buy-to-let (raised from 6% in December 2024).

LTT — Wales

Land Transaction Tax bands (2025/26): • £0 – £225,000: 0% • £225,001 – £400,000: 6% • £400,001 – £750,000: 7.5% • £750,001 – £1.5m: 10% • Above £1.5m: 12% No first-time buyer relief in Wales — the higher nil band compensates. Additional property surcharge: +4% on top of standard rates.

Lifetime ISA

If you are 18–39, the Lifetime ISA (LISA) lets you save up to £4,000/year and receive a 25% government bonus — up to £1,000 free per tax year — toward a first home or retirement. Key rules: • Must be opened before 40 • Property cap: £450,000 (unchanged for years — increasingly bites in London/SE) • Money must be in the LISA for at least 12 months before first-home purchase • 25% withdrawal penalty if used for anything other than first home or after age 60 — meaning you effectively lose more than the bonus For a couple, both partners can have a LISA — up to £8,000/year saved with £2,000 bonus. Over 5 years that is £50,000 toward a deposit including £10,000 of free government money.

Home office — CGT / PPR risk

TCGA 1992 ss.222–226 give Principal Private Residence relief on the sale of your only or main home — but only on the part actually used as a residence. If a room is used exclusively for business, that proportion of the property is excluded from PPR and may attract CGT on sale. On a £200,000 gain with 10% of the property used exclusively for business, £20,000 of gain is chargeable — at up to 24% that is £4,800. How to avoid the link entirely: • Use HMRC's simplified expenses (flat £6/week home office) — claims do not depend on exclusive use • Use dual-use rooms (used for business AND personal — e.g. a study you also use for hobbies, a kitchen table for admin); HMRC accepts these as not exclusive • Avoid words like 'office used solely for business' on your tax return or insurance documents

Shared ownership + legacy schemes

Help to Buy equity loan closed to new applications in 2022/23. Remaining options: Shared ownership: buy 25–75% of a property and pay rent on the rest. SDLT can be calculated either on the share purchased (lower upfront) or on the full market value (better long-term as future staircasing is then SDLT-free). One-off choice at first purchase. Staircasing: buying additional shares over time. Each step can trigger SDLT depending on the original election. First Homes scheme: new-build homes for FTBs at 30–50% discount, with the discount locked in for future buyers. Limited geographic availability. Mortgage Guarantee Scheme: lets banks offer 95% LTV mortgages with a government guarantee on the top slice — useful if your deposit is thin.

Specialist SE mortgage brokers

A self-employed specialist broker earns their fee on the first transaction. They know: • Which lenders accept 1 year of accounts • Which lenders treat retained company profits as income for Ltd directors • Which lenders are friendly to day-rate contractors • Which lenders accept high-expense trades (e.g. tradespeople with significant vehicle costs) • Which lenders are tolerant of recent income drops • Lender criteria change quarterly — DIY research is usually stale Most brokers are paid by lender commission and charge no fee to you. Even fee-charging brokers often save more than they cost via product selection.

Planning sequence

Practical sequence for a self-employed buyer 2–3 years out: 1. Decide a realistic purchase horizon (12, 24, 36 months) and target price range. 2. Sit down with your accountant AND a self-employed specialist broker together — they think in different units and the conversation is faster. 3. Optimise across three goals: minimise total tax over the planning period, maximise SA302 income in the years your lender will see, minimise CGT exposure (home office, etc.). 4. Build the deposit: maximise LISA, ISA, partner's LISA, gifted deposit from family (lenders accept these with a gift letter). 5. Keep bookkeeping spotless — month-by-month bank reconciliation, accountant-prepared accounts, no large unexplained cash movements. 6. Pre-approval with the broker before house-hunting so you bid with certainty.

Related calculators

• Stamp Duty Calculator →
• Income Tax Calculator →

Related guides

• Should I Go Ltd? →
• First 90 Days Self-Employed →

Frequently asked questions