Buying your first home is the largest financial commitment most people ever make, and the process is deliberately full of unfamiliar terms. This guide walks through it in order — from deposit to keys — and flags the costs that catch people out.
Owning is not automatically better than renting. It is better under certain conditions, and worse under others. Being honest about which situation you are in prevents an expensive mistake.
Buying tends to make sense when you expect to stay put for several years, have stable income, hold savings beyond the deposit, and your debts are under control. The reason time matters is that the costs of buying and selling are substantial — if you move within two or three years, those transaction costs can easily exceed anything you gained.
Renting often remains the better choice if your job might relocate you, your income is new or irregular, you have high-interest debt, or buying would leave you with no emergency savings at all.
Do not empty your emergency fund for the deposit. New homeowners face repairs that landlords used to handle, and a boiler failing in month two is common enough to plan for.
Deposit requirements vary by country and loan type, but the underlying logic is universal: the more you put down, the less risk the lender carries, and the better the terms you are offered.
| Deposit size | Typical consequence |
|---|---|
| 5% | Possible with some schemes; highest rates, mortgage insurance almost certain |
| 10% | Wider choice of lenders, better rates than 5% |
| 20% | Usually avoids mortgage insurance; noticeably better rates |
| 25%+ | Access to the most competitive products available |
The jump at 20% is the one to understand. Below it, most lenders require mortgage insurance — a premium that protects the lender, not you, if you default. It can add a meaningful amount to every monthly payment, and on some products it never falls away.
That said, waiting years to reach 20% is not automatically right either. If house prices and rent are both rising faster than you can save, buying sooner with a smaller deposit may cost less overall. Run both scenarios with real numbers rather than following a rule.
Many countries operate first-time buyer schemes — shared ownership, government-backed low-deposit loans, savings bonuses, or reduced purchase taxes. These change frequently, so check what currently applies where you live before assuming the standard rules.
Mortgage underwriting looks intimidating but assesses four straightforward things.
Your income. Stable, provable and ideally consistent. Employees usually need several months of payslips; the self-employed typically need two or three years of accounts, which is worth knowing well before you apply.
Your existing debts. Lenders compare your total monthly debt payments against your income. Car loans, credit card minimums and student loans all reduce what you can borrow — sometimes more than people expect.
Your credit history. A stronger credit score means better rates. Check your report months in advance, because correcting an error takes time you will not have during a purchase.
Your deposit and its source. Lenders must verify where the money came from. Gifts usually need a letter confirming they are not loans. Money that appeared recently without explanation causes delays.
From the moment you apply until completion, change nothing financially. Do not switch jobs, open a credit card, buy a car on finance, or make large unexplained transfers. Lenders re-check before releasing funds, and purchases have collapsed at the final step over exactly this.
A pre-approval — sometimes called a decision in principle or agreement in principle — is a lender's provisional statement of how much they would lend you, based on information they have checked.
It does two valuable things. It tells you your genuine budget, so you stop viewing homes you cannot buy and stop dismissing ones you can. And it makes your offer credible: sellers strongly prefer buyers who have already demonstrated they can obtain finance.
Pre-approvals typically last a few months and can be renewed. Getting one usually involves a credit check, so do it when you are genuinely ready to look rather than out of curiosity.
Here is the most important sentence in this guide: the maximum a lender will approve is not the amount you should borrow.
Lenders assess whether you can make the payments. They do not assess whether you can make the payments and save for retirement, and replace the car, and take a holiday, and absorb a rate rise. That judgement is yours alone.
A widely used guideline is to keep total housing costs — mortgage, insurance, property tax, service charges — below about 28% of gross income, and all debt payments below roughly 36%. These are rules of thumb, not laws, and in expensive cities they may be unrealistic. But if you are far above them, understand precisely what you are giving up in exchange.
Before committing, run a stress test. Calculate the payment if rates were two percentage points higher. If that figure frightens you, borrow less — especially on a variable rate or a short fixed period.
Three decisions matter more than the rest.
Fixed or variable. Fixed gives payment certainty; variable often starts cheaper but can rise. For a first purchase, where budgets are usually tightest, the predictability of a fix is frequently worth the slightly higher rate. See our guide to interest rates for the full comparison.
The term. A longer term lowers the monthly payment and substantially increases total interest. Many first-time buyers choose a long term for affordability and then overpay when they can — a reasonable strategy, provided the loan permits overpayments.
Rate versus fees. The lowest advertised rate frequently carries a large arrangement fee. Compare using APR, which includes fees, and think about how long you will actually keep the loan.
Also ask two specific questions: what happens when the fixed period ends, and are there early repayment charges? Both have caught out buyers who focused only on the opening rate.
Timescales vary widely by country, but a typical purchase takes two to three months from accepted offer to keys. Chains — where your seller is also buying — are the usual cause of delays.
A survey or inspection costs a few hundred and routinely saves thousands. It is the best value purchase in the entire transaction.
Critically, the lender's valuation is not a survey. It exists only to confirm the property is worth enough to secure the loan. It does not assess the roof, the wiring, the damp or the structure, and buyers who assume otherwise have inherited very expensive problems.
Surveys typically come in levels, from a basic condition report to a full structural survey. For older properties, anything unusual in construction, or anything that looks altered, pay for the more thorough option.
If the survey finds problems you have three options, all reasonable: ask the seller to fix them, renegotiate the price to reflect the cost, or walk away. Walking away from a bad property is not wasted money — it is the survey doing precisely its job.
Buying your first home is stressful mainly because it is unfamiliar. Understand the sequence, budget for the full cost rather than the headline one, and be willing to walk away, and you will make a far better decision than most first-time buyers do.
Include tax and insurance to get a realistic monthly figure.
Try the Mortgage CalculatorImportant: property law, taxes, deposit rules and buyer schemes differ substantially between countries and change often. This article is general educational information, not financial or legal advice — confirm the rules that apply where you are buying. See our Disclaimer.
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