What Credit Score Do You Need for a Mortgage?
If you're thinking about a mortgage, your credit score matters. A lot. It's one of the first things lenders check, and it can mean the difference between a mortgage approval and a rejection — or the difference between a competitive interest rate and paying thousands more over 25 years.
This guide covers what credit score you actually need for a mortgage in the UK, how lenders use it, and practical steps to improve yours before you apply.
What Credit Score Do You Need for a Mortgage?
Most UK lenders will lend to people with a credit score in the "fair" range (300–669 on the Equifax scale), though the better your score, the better the rate you'll get. There's no official "minimum" credit score set by law — each lender decides — but a score below 500 will trigger rejections or specialist lenders with higher rates.
Here's the practical breakdown:
- 700+ — You'll qualify for the best rates. Lenders see minimal risk, and you'll compete for their prime mortgage products.
- 650–700 — Good range. You'll approve for most lenders, though you might pay 0.2–0.5% more in interest than prime borrowers.
- 550–650 — Fair range. Some lenders accept this, but your choices narrow. Expect fewer products, potentially higher rates, and stricter requirements on deposit size.
- Below 550 — Difficult. Mainstream lenders largely won't touch you. Specialist lenders exist, but at significantly higher cost.
The difference between a 700+ score and a 600 score can easily cost you £100–£150 per month on a £200,000 mortgage. That's roughly £30,000–£45,000 over a 25-year term.
To check your credit score in the UK, use one of the three main credit reference agencies: Experian, Equifax, or TransUnion. All three offer free access to your score. Checking your own credit report costs nothing and doesn't damage your score — that only happens when a lender makes a "hard" inquiry.
How Lenders Actually Use Your Credit Score
Your credit score is built from your credit history — a record of how you've borrowed money and paid it back. Lenders use it as a fast way to predict whether you'll repay a mortgage.
But it's not the whole story. When you apply for a mortgage, your lender will:
- Check your credit score — instant red flag if it's too low
- Review your credit history in detail — looking for late payments, defaults, court judgments, and recent credit applications
- Run affordability checks — can you actually afford the monthly payments at higher interest rates?
- Assess your income and employment — payslips, tax returns, P60s, and proof of stable income
That's why mortgage pre-approval is so useful: a lender runs these checks early, giving you confidence before you make an offer on a property. You'll know your actual borrowing power, not just a rough estimate.
The credit score is a filter, but it's not the only gate. A score of 700 with unstable income might get rejected; a score of 640 with steady employment and a 15% deposit might sail through. This is why understanding what counts as income on a mortgage application matters — if you're self-employed, freelance, or have multiple income sources, how lenders assess your income can make or break the application.
Credit Score Ranges and What They Mean
The UK doesn't have a unified credit score system — each of the three reference agencies calculates scores differently. Experian's scale goes 0–999, Equifax's 0–700, TransUnion's 0–710. Don't panic if the numbers look different; they're measuring the same underlying data.
What matters to mortgage lenders is whether your score indicates credit risk. Here's what lenders see:
| Score range (Experian) | Label | Mortgage prospect |
|---|---|---|
| 961–999 | Excellent | Best rates, most lenders compete for you |
| 881–960 | Very good | Competitive rates, minimal scrutiny |
| 721–880 | Good | Standard rates, straightforward approval |
| 561–720 | Fair | Some lender choice, possible premium on rate |
| Below 561 | Poor | Limited lenders, higher rates, stricter terms |
Your score can shift month-to-month as new data arrives (paid-off debts, new credit applications, missed payments). Most lenders check your score fresh when you apply, not relying on a screenshot you took last month.
Why Your Credit Score Matters More Than You Think
It's easy to dismiss credit scores as just another financial metric. But here's why they actually matter for mortgages:
Rate difference: A 0.5% rate difference on a £200,000 mortgage over 25 years costs roughly £24,000 more in interest. Your credit score can be the difference between 4.2% and 4.7% — that's a direct impact on your total cost.
Deposit size: Lenders often tighten loan-to-value (LTV) requirements for lower-credit borrowers. You might need a 15% deposit (85% LTV) instead of the standard 10% (90% LTV). On a £200,000 property, that's an extra £10,000 you need to save. Our guide on how much deposit you need for a mortgage walks through these LTV bands in detail.
Getting a deal at all: Below 550, you might not get approved by mainstream lenders at any price. Specialist lenders exist, but they typically charge 2–3% above standard rates.
Speed and friction: A pristine credit score = smooth, fast approval. A muddled credit report = lenders asking questions, demanding explanations, ordering additional proof. It adds weeks to the process and creates real stress.
If you're planning to buy a home in the next year, now is the time to check your score and start improving it. Our first-time buyer mortgage guide covers the full timeline; building your credit score should be step one.
5 Quick Wins to Improve Your Credit Score
You can't instantly fix years of missed payments, but you can improve your score meaningfully in 3–6 months:
1. Check your credit report for errors Mistakes happen. Sometimes missed payments are recorded twice, or someone else's debt appears on your file. Pull your full report from all three agencies (Experian, Equifax, TransUnion) and dispute any inaccuracies. This is free and takes a few weeks to resolve, but it can boost your score 20–50 points.
2. Register on the Electoral Roll If you've moved in the last year and haven't updated your address on the Electoral Roll, do it now. This is one of the first things lenders check for identity verification, and it's a quick win — typically a 10-point gain.
3. Pay down existing credit balances Your "credit utilization" (how much of your available credit you're using) affects your score. If you've got a credit card maxed out at £5,000/£5,000, your utilization is 100% — bad signal. Paying it down to £1,500/£5,000 (30% utilization) improves your score noticeably. You don't need to pay it off entirely; just bring it below 50% utilization.
4. Set up a payment plan for old debts If you've got an old debt in default or collections, contact the creditor and offer a repayment plan. Once you start paying regularly on time, the score impact gradually lessens. It's not a quick fix, but it signals to future lenders that you're committed to settling your obligations.
5. Avoid new credit applications in the lead-up to your mortgage application Every mortgage application, credit card application, or personal loan inquiry creates a "hard" search on your credit file. Multiple searches in a short window = red flag (looks like you're desperate for credit). Before applying for a mortgage, avoid new credit for at least 3 months. This is why a mortgage stress test before you formally apply is so valuable — you'll know if you're likely to pass before you trigger the hard searches.
If your score is low and you want to understand the specific factors dragging it down, most reference agencies now offer "detailed" reports that break down which debts, missed payments, or other factors are costing you points. Use that intel to prioritize what to fix.
Frequently Asked Questions
Q: What credit score do I need to get a mortgage? A: Most lenders accept scores of 550+, but you'll get better rates and more product choice at 650+. The best rates are typically reserved for scores of 700+. Use our mortgage calculator to see how different deposit sizes and rates affect your monthly payment.
Q: How long does it take to improve a credit score? A: Small improvements (20–50 points) can happen in 1–2 months if you pay down balances or fix errors on your report. Larger gains (100+ points) typically take 3–6 months of consistent on-time payments. Old negative marks (missed payments, defaults) can take years to stop affecting your score, though their impact diminishes over time.
Q: Do mortgage brokers help with credit scores? A: Not directly — they can't improve your score. But they can help you find lenders who accept lower scores, and they understand which specific lenders look beyond the headline score if you have a good deposit or stable income. Our guide on how mortgage brokers work explains when they're worth using.
Q: Does checking my credit score damage it? A: No. Checking your own credit report (a "soft" search) doesn't affect your score. Only "hard" searches from lenders do. You can check your score as often as you like for free.
Q: Should I get a guarantor if my credit score is too low? A: Not recommended for mortgages. UK mortgage lenders don't typically accept guarantors — they want to see that you personally can afford the mortgage. If your score is too low, better options include: building your score for 3–6 months, saving a larger deposit (which improves your LTV and makes you less risky), or approaching a specialist lender.
Q: What if my partner has a poor credit score — does that hurt our joint mortgage application? A: If you apply jointly, lenders will pull both credit files. A poor score from one partner affects your joint application. However, you can apply as sole applicant if one partner's score is significantly stronger, or explore whether calculating your mortgage affordability on a single income still works for your budget. Check with a broker first; some lenders handle joint applications better than others.
Q: Can I get a mortgage if I've got a county court judgment (CCJ) on my credit file? A: Yes, but it's harder. If the CCJ was paid in full and is more than 6 years old, it will be removed from your file automatically. If it's still active, some mainstream lenders will reject you outright; specialist lenders exist but at higher cost (typically 1–2% above standard rates). Consider waiting until the CCJ drops off, or building your deposit to 20%+ to improve your appeal.
Q: What's the difference between an agreement in principle and a full mortgage offer? A: An agreement in principle (or mortgage pre-approval) is a lender saying "based on what you've told us, we'd probably lend you this much." It's not a guarantee — they'll do a full affordability check and property valuation when you apply properly. See our mortgage pre-approval guide for details on how to use one effectively.
Next Steps
Check your credit score now using Experian, Equifax, or TransUnion. It's free and takes 5 minutes. If it's below 650, spend 3–6 months on the improvements above before applying for a mortgage — it'll save you thousands in interest.
If you know your score and deposit, plug the numbers into our mortgage calculator to see what you can realistically borrow. For first-time buyers, our first-time buyer mortgage guide walks through the full process from credit score check to offer.
Most importantly: don't let a low credit score stop you from buying. It might delay you 6–12 months, but it's fixable. Build your score, save a bigger deposit, and you'll get a better deal.