How to Get Pre-Approved for a Mortgage
A mortgage pre-approval tells you — and sellers — roughly how much a lender is willing to lend you. This guide explains what pre-approval is, what lenders look at, and the exact steps to get one without hurting your chances.
First-time buyers and anyone getting ready to house-hunt who wants to understand mortgage pre-approval before they start viewing properties.
What you'll learn:
- The real difference between pre-qualification and pre-approval
- The four things lenders assess before they'll lend
- Exactly which documents to prepare
- A step-by-step route to a pre-approval decision
- The mistakes that can derail an application at the last minute
Pre-qualification vs pre-approval
These terms are often used loosely, but they're not the same. Pre-qualification is a quick, informal estimate based on figures you tell the lender — useful for a ballpark, but not verified. Pre-approval is more thorough: the lender checks your finances and credit and issues a conditional commitment to lend up to a certain amount, usually in writing. In some countries this is called an "agreement in principle", "decision in principle" or "mortgage pre-approval", and the exact weight it carries varies.
Why it matters: a pre-approval letter shows estate agents and sellers you're a serious, credible buyer, and it tells you a realistic budget before you fall in love with a home you can't finance. It is not a final mortgage offer — that comes later, after a full application and a valuation of the specific property.
What lenders check
Lenders are answering one question: can you comfortably repay this loan? They assess four things.
| What lenders check | In plain English | How to strengthen it |
|---|---|---|
| Income & stability | How much you earn and how reliable it is. | Have recent payslips or accounts ready; avoid changing jobs mid-process. |
| Debts (DTI) | Your monthly debt payments vs income. | Pay down or clear small balances before applying. |
| Credit history | How you've handled past borrowing. | Check your report early and fix errors; pay everything on time. |
| Deposit / down payment | The cash you put in (affects your LTV). | A bigger deposit usually means better rates and easier approval. |
Two levers do the most to improve your outcome: a lower debt-to-income ratio and a larger deposit. Even clearing a couple of small debts before you apply can change the number a lender is willing to offer.
Documents to gather
Having these ready before you apply makes pre-approval faster and smoother. Exact requirements vary by country and lender, but you'll usually need:
- Proof of identity and address
- Recent income evidence — payslips, or accounts and tax documents if self-employed
- Bank statements (often the last 3–6 months)
- Details of existing debts and regular outgoings
- Evidence of your deposit and where it came from
How to get pre-approved, step by step
Check your credit report and fix errors early
Your credit history is central to the decision, so pull your report weeks before you apply and correct any mistakes (see our credit score guide). Small fixes take time to update, so start early.
Work out your realistic budget
Look honestly at your income, debts and living costs. Lenders apply affordability tests, and it's wise to leave yourself a buffer for higher interest rates and life's surprises rather than borrowing the absolute maximum.
Save and document your deposit
A larger deposit lowers your loan-to-value (LTV), which usually unlocks better rates and easier approval. Lenders also check the source of your deposit, so keep records if any of it is gifted.
Compare lenders before you apply
Rates, fees and lending criteria differ a lot between lenders. A mortgage broker can compare the market for you; you can also approach lenders directly. Comparing first means you apply where you're most likely to be approved on good terms.
Submit your pre-approval application
Provide your documents and let the lender run its checks. Be honest and accurate — verified information is the whole point of pre-approval, and discrepancies cause delays or declines.
Once you're pre-approved, don't rock the boat before completion: avoid taking on new debt, making large unexplained purchases, or changing jobs. Lenders often re-check your finances before the final offer, and any of these can undo an approval.
Use your letter — and mind its expiry
A pre-approval typically lasts a limited window (often around 30–90 days, varying by lender and country). House-hunt within that period, and ask the lender to refresh it if your search runs long.
Common mistakes
- Opening new credit mid-process. A new card or car loan changes your DTI and can sink the application.
- Borrowing the maximum offered. The cap is what a lender will allow, not what's comfortable for you.
- Ignoring fees. Arrangement, valuation and legal fees add up — factor them into the budget.
- Treating pre-approval as final. The formal offer still depends on a full application and the property's valuation.
Frequently asked questions
How long does a mortgage pre-approval last?
It varies by lender and country, but commonly around 30 to 90 days. If your house search runs longer, ask the lender to renew it with updated information.
Does getting pre-approved affect my credit score?
It can. A full pre-approval often involves a hard credit check, which may cause a small, temporary dip. Informal pre-qualification usually uses a soft check that doesn't affect your score.
Is pre-approval a guarantee I'll get the mortgage?
No. It's a conditional indication based on your finances at that moment. The final offer depends on a complete application and a valuation of the specific property, and on nothing major changing in between.
How big a deposit do I need?
It varies widely by country and product. As a rule, a bigger deposit lowers your loan-to-value and tends to unlock better rates — but minimums differ, so check current requirements for your market.
Glossary terms
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Official resources by country
Rules, limits and protections differ by country. Start with the official regulator or government-backed guidance for your jurisdiction:
- US Consumer Financial Protection Bureau (CFPB)
- UK MoneyHelper — government-backed money guidance
- CA Financial Consumer Agency of Canada
- AU ASIC's MoneySmart
- NZ Sorted — independent money guidance