Mortgage lenders carry out detailed credit checks — more thorough than for personal loans or credit cards. Understanding how your credit history will be assessed before you apply can prevent costly declined applications.
For broader mortgage guidance, see the Mortgages hub.
How Mortgage Lenders Use Credit Scores
Mortgage lenders use credit scores as one input in their decision, alongside:
- Income and employment stability
- Deposit size (loan-to-value ratio)
- Affordability assessment (mortgage payment vs income)
- Existing debt commitments
- The specific property being purchased
A good credit score does not guarantee mortgage approval — poor affordability or a large existing debt burden can still result in a decline.
Credit Score Ranges — Approximate Mortgage Impact
Different credit reference agencies use different scales. Below is a general guide to what different score levels mean for mortgage applications:
| Credit level | Experian score | Equifax score | Likely mortgage outcome |
|---|---|---|---|
| Excellent | 961–999 | 531–700 | Best rates; widest lender choice |
| Good | 881–960 | 466–530 | Most mainstream lenders available |
| Fair | 721–880 | 380–465 | Some lenders; may face higher rates |
| Poor | 561–720 | 280–379 | Specialist lenders; higher deposit needed |
| Very poor | 0–560 | 0–279 | Specialist only; high rates and deposit |
Note: These ranges are approximate guides — each lender applies its own criteria and scoring model.
Impact of Specific Credit Issues on Mortgage Applications
| Issue | Impact | How long it matters |
|---|---|---|
| Late payment (1–2 months) | Moderate | 2–3 years significant; 6 years total |
| Default (satisfied) | Significant | 3 years strongly; 6 years total |
| Default (outstanding) | Very significant | Full 6 years — settle before applying |
| CCJ (satisfied) | Significant | 3 years strongly; 6 years total |
| CCJ (outstanding) | Very significant | Full 6 years |
| IVA (completed) | Very significant | Up to 6 years from start date |
| Bankruptcy (discharged) | Extreme | Specialist only until 6 years from order |
| Missed mortgage payment | Very significant | All 6 years on file |
Improving Your Score Before Applying
| Action | Impact on mortgage application |
|---|---|
| Register on electoral roll | Establishes address; identity verification for lenders |
| Settle outstanding defaults or CCJs | ‘Satisfied’ is significantly better than outstanding |
| Reduce credit card utilisation | Lower balances improve DTI and credit score |
| Avoid new credit applications for 6+ months | Fewer hard searches on file before mortgage application |
| Correct credit file errors | File a dispute with the relevant CRA — errors can be removed |
| Build up deposit | Higher deposit = lower LTV = more lenders available |
Working With a Mortgage Broker
For applicants with any adverse credit history, an independent mortgage broker is strongly recommended:
- Brokers know which lenders are currently accepting applicants with your specific credit profile
- A broker’s soft search can assess multiple lenders without leaving hard footprints
- Specialist adverse credit brokers have relationships with non-high-street lenders that are not easily accessible directly
What Mortgage Lenders Actually Look at Beyond Your Score
Your credit score is a starting point, not the whole picture. Mortgage underwriters look at the full detail of your credit file, plus:
Bank statements (3–6 months): Lenders look for gambling transactions, overdraft reliance, missed direct debits, and patterns of financial stress. Regular BNPL use, frequent overdraft use, or large cash withdrawals can prompt questions even if your credit score is good.
Employment stability: Most mainstream lenders require at least 2 years in the same job or industry. Self-employed applicants typically need 2–3 years of accounts. Zero-hours contracts require specialist lenders who will average your income across 12 months.
Deposit size: A larger deposit lowers the loan-to-value (LTV), reducing lender risk and unlocking better rates. At 10% deposit (90% LTV), lenders scrutinise credit history more carefully than at 25% (75% LTV).
Income multiples: Most lenders cap borrowing at 4–4.5x your gross income, though some offer 5–5.5x for higher earners or professionals. Your credit score does not affect the income multiple directly, but it determines which lenders you have access to.
The 6 Months Before Your Mortgage Application
Actions that improve your mortgage readiness:
- Register to vote at your current address — lenders use the electoral roll to verify identity and address stability
- Pay down credit card balances — aim for under 30% utilisation on each card
- Avoid new credit applications — each hard search is visible to the mortgage lender and can raise questions
- Review 3 months of bank statements — identify anything a lender might query (gambling, unusual transfers) and be prepared to explain
- Do not change jobs in the 3 months before applying — even for a better-paid role, a probationary period can complicate some lenders’ affordability assessments
- Save as much as possible — not just for the deposit, but to demonstrate financial stability on your bank statements
Different Mortgage Types and Their Credit Requirements
| Mortgage Type | Minimum Credit Requirement | Notes |
|---|---|---|
| Residential (standard) | Good credit, no recent adverse | Most restrictive — automated scoring at high street banks |
| Buy-to-Let | Similar to residential | Some BTL lenders are more flexible on minor adverse |
| Shared Ownership | More flexible | Housing associations may apply their own criteria |
| Right to Buy | Standard residential | Must be existing social tenant |
| Adverse / bad credit | Poor or very poor accepted | Specialist lenders only, via broker |
Using a Mortgage Broker vs Going Direct
If your credit score is anything less than excellent, using a whole-of-market mortgage broker significantly improves your outcome:
- Brokers have access to lenders not available to the public direct (including specialist adverse lenders)
- They can identify which lenders are most likely to accept your profile before submitting a formal application — preventing unnecessary hard searches on your credit file
- They understand each lender’s underwriting nuances (e.g., which lenders are lenient on 1 missed payment 3 years ago vs which are strict)
Fee-free whole-of-market brokers (who earn commission from the lender rather than charging you) include London & Country, Habito, and Trussle. For adverse credit cases, specialist broker firms such as Mortgages for Bad Credit or Simply Adverse may have deeper relationships with the relevant lenders.