If you’ve never bought a home before, the UK mortgage process can feel like it’s been deliberately designed to confuse you. It hasn’t — but it does involve a lot of moving parts that lenders, agents, and conveyancers all assume you already understand.
This guide walks through what’s actually different in 2026, the numbers that genuinely matter, and the bits of the process where first-time buyers most often get caught out.
Step 1: how much can you actually borrow
The headline number every lender uses is loan-to-income, usually capped at 4.5× a single income or joint income. So:
- £40,000 single income → roughly £180,000 maximum
- £75,000 joint income → roughly £337,500 maximum
But that’s only the ceiling. The number you actually qualify for is a stressed affordability calculation: the lender pretends interest rates rose by 1–3 percentage points and checks whether you could still meet repayments. Bank credit card balances, car finance, student loan repayments, and even regular subscriptions feed in.
The practical implication: clearing a £4,000 credit card balance before you apply can increase your borrowing capacity by £15,000–£25,000.
Step 2: deposit size and what it does to your rate
UK lenders price mortgages in loan-to-value (LTV) bands. The lower your LTV, the better the rate. Typical bands in 2026:
| LTV | What this means | Effect on rate |
|---|---|---|
| 95% | 5% deposit | Highest rate; thinnest range of products |
| 90% | 10% deposit | A meaningful step down |
| 85% | 15% deposit | A solid mainstream tier |
| 75% | 25% deposit | Strong pricing |
| 60% | 40% deposit | Best rates available |
A 5% deposit will buy a home, but the difference between a 95% and 90% LTV mortgage on a £250,000 home can be £40+ a month over a 30-year term.
Step 3: the schemes worth knowing
The Help to Buy equity loan scheme has closed, but a handful of options remain:
- Lifetime ISA: 25% government top-up (up to £1,000/year) on savings used for a first home worth up to £450,000.
- First Homes scheme: certain new-build homes sold at 30–50% below market rate to local first-time buyers.
- Mortgage Guarantee Scheme (where active): supports lender access to 95% LTV mortgages.
- Shared Ownership: buy a share (25–75%) and pay rent on the rest.
Read the eligibility rules carefully — particularly for Lifetime ISA, where withdrawing for any reason other than a qualifying first home or retirement carries a 25% penalty that takes more than your bonus.
Step 4: fixed vs tracker
A fixed rate holds your interest rate steady for an agreed period, usually 2, 3, or 5 years. A tracker mortgage moves with the Bank of England base rate.
A practical heuristic for first-time buyers in 2026:
- If you value certainty and your budget is tight, a 5-year fix gives you the longest runway of predictable payments.
- If you want flexibility and you think rates are heading down, a 2-year fix or a tracker without early repayment charges keeps your options open.
Step 5: the costs nobody warns you about
Beyond the deposit, budget for:
- Solicitor fees: £1,000–£1,800 typically.
- Survey: £400–£1,200 depending on how thorough.
- Stamp duty: zero up to £425,000 for first-time buyers buying a home worth up to £625,000 (rules current at time of writing).
- Mortgage product fee: often £0–£999, sometimes added to the loan.
- Buildings insurance: required from exchange.
- Removals and post-move basics: £500–£2,000.
A useful rule: budget at least 4% of the property price for these on top of your deposit. For a £250,000 home, that’s £10,000.
Step 6: getting the application across the line
Lenders move quickly when documents arrive in one batch. Have ready:
- Three months of bank statements
- Three months of payslips, plus the most recent P60
- Photo ID and proof of address
- Self-employed: two years of accounts or SA302 tax calculations
Once an application is in, two things tend to slow it down: a property valuation that comes in below the agreed price, or an underwriter query about an unusual transaction on a bank statement (that £4,500 transfer from your parents needs a “gifted deposit” letter).
What I’d do if I were starting today
If you’re just beginning the process, take this sequence:
- Run an Experian, Equifax and TransUnion credit check; fix any errors.
- Stop opening new credit lines for six months before applying.
- Save into a Lifetime ISA if you’re under 40 and likely to buy within five years.
- Get a “decision in principle” from one mainstream lender to know your number.
- Start house hunting with that number, not the agent’s optimistic one.
It is a lot. But the process rewards organised buyers, and a well-prepared application can land you a meaningfully better rate than a chaotic one.
Frequently asked questions
- How much deposit do I need to buy a home in the UK?
Most lenders require a minimum 5% deposit for first-time buyers, but you'll typically get a much better rate at 10% or 15%. Some lenders offer 100% mortgages for renters with a strong payment history.
- What does a mortgage lender check on my application?
Affordability based on income and outgoings, your credit history, deposit source, employment status, and any existing debts. They'll usually stress-test repayments at a higher rate too.
- How long does a UK mortgage take to complete?
From offer accepted to completion, expect 8–14 weeks on average. The mortgage offer itself usually takes 2–4 weeks once your application is in.
