What Credit Score Do You Need for a Buy-to-Let Mortgage in the UK?
Published 10th of September 2023·Updated 9 April 2026
Reviewed by: Reviewed for accuracy April 2026
Most buy-to-let mortgage lenders in the UK require a credit score in the "good" or "excellent" range with at least one of the three main credit reference agencies: Experian, Equifax, or TransUnion. There is no single universal threshold, but a score below "fair" makes approval significantly harder and will usually result in higher interest rates if you are accepted.
Short Summary
There is no single credit score that guarantees approval for a buy-to-let mortgage. Each lender sets its own criteria and uses its own preferred credit reference agency.
As a general guide, a score rated "good" or above with Experian (721 or higher), Equifax (420 or higher), or TransUnion (604 or higher) puts you in a competitive position with most mainstream lenders.
Credit score is only one part of the assessment. Lenders also look at your income, existing debts, deposit size, and the rental income the property is expected to generate.
If your score is lower than you would like, there are practical steps you can take to improve it before applying. Applying with a poor score and being declined can itself damage your score further.
What credit score do buy-to-let lenders actually look for?
Each credit reference agency uses a different scale, so "good" means a different number depending on which agency a lender consults. The table below shows the broad score bands for each agency.
| Agency | Poor | Fair | Good | Excellent |
|---|---|---|---|---|
| Experian (0-999) | 0-560 | 561-720 | 721-880 | 881-999 |
| Equifax (0-700) | 0-278 | 279-419 | 420-465 | 466-700 |
| TransUnion (0-710) | 0-565 | 566-603 | 604-627 | 628-710 |
Most high-street buy-to-let lenders, including Barclays, NatWest and Santander, aim for applicants in the "good" band or above. Specialist buy-to-let lenders such as Paragon and Fleet Mortgages may consider applications with lower scores, though typically at higher rates.
Why does credit score matter for a buy-to-let mortgage?
A buy-to-let mortgage is a larger and longer financial commitment than most personal loans. Lenders use your credit score as a quick indicator of how reliably you have managed debt in the past. A strong score suggests you pay on time, keep debt levels manageable, and are unlikely to default.
Your credit file shows lenders your payment history, any county court judgements (CCJs), defaults, bankruptcies, and current levels of debt. Even one missed payment in the past 12 months can push a borderline application towards rejection. Lenders are also required by the Financial Conduct Authority (FCA) to carry out responsible lending checks, which include a thorough review of your credit history.
What other factors do buy-to-let lenders assess?
Credit score is one factor among several. Most buy-to-let lenders in the UK also require:
- A minimum deposit of 25 per cent of the property's value (some lenders ask for more)
- Evidence that the expected rental income will cover at least 125 per cent of the monthly mortgage payment, often calculated at a stressed interest rate of around 5 to 5.5 per cent
- A minimum personal income, typically £25,000 per year, though this varies
- No recent CCJs, defaults, or individual voluntary arrangements (IVAs)
- You must already own your own home (required by many, though not all, lenders)
The table below summarises typical buy-to-let mortgage requirements across mainstream lenders.
| Requirement | Typical threshold |
|---|---|
| Minimum deposit | 25% of property value |
| Rental income coverage | 125-145% of mortgage payment |
| Minimum personal income | £25,000 per year |
| Minimum credit score | "Good" band (see table above) |
| Maximum age at end of term | 70-85 years (varies by lender) |
How can I improve my credit score before applying?
If your score falls short, these actions are most effective:
Register on the electoral roll at your current address. Lenders use it to verify your identity, and being absent from it is one of the quickest ways to lower your score.
Pay every bill on time. Payment history is the most heavily weighted factor in your credit score. Setting up direct debits for minimum payments on credit cards and loans prevents accidental missed payments.
Reduce your credit utilisation. If you regularly use more than 30 per cent of your available credit card limit, try to pay balances down. Experian and TransUnion both weight utilisation heavily.
Check your report for errors. All three agencies offer free access to your credit report. Request yours via Experian, ClearScore (which uses Equifax data), or Credit Karma (which uses TransUnion data). Dispute any incorrect entries; errors are more common than people realise and can knock significant points off your score.
Avoid applying for new credit in the six months before a mortgage application. Each hard search leaves a footprint on your file, and multiple searches in a short period signal financial stress to lenders.
Should I use a mortgage broker for a buy-to-let application?
Using a whole-of-market mortgage broker is advisable for most buy-to-let applications, particularly if your credit history is anything less than excellent. Brokers have access to deals not available directly from lenders, and they know which lenders are most likely to approve your specific profile before you formally apply. A formal rejection leaves a hard search on your file, so avoiding unnecessary applications matters.
FAQ
What is the minimum credit score for a buy-to-let mortgage in the UK?
There is no single minimum, as each lender sets its own standard. As a practical guide, a score in the "good" band with Experian (721 or above), Equifax (420 or above), or TransUnion (604 or above) gives you a reasonable chance with mainstream lenders. Scores below "fair" will limit you to specialist lenders at higher rates.
Can I get a buy-to-let mortgage with bad credit?
Yes, but your options are considerably more limited. Specialist lenders such as Precise Mortgages or Pepper Money consider applicants with adverse credit history, including CCJs and defaults. You should expect a higher interest rate and a larger deposit requirement. A mortgage broker can identify which lenders are most likely to consider your application.
Does a buy-to-let mortgage affect my residential mortgage?
A buy-to-let mortgage will appear on your credit file and is included in affordability calculations if you later apply for a residential mortgage. Lenders will assess whether you can manage both commitments simultaneously.
How many buy-to-let mortgages can I have?
There is no legal limit. However, once you own four or more mortgaged buy-to-let properties you are classified as a "portfolio landlord" by the Prudential Regulation Authority (PRA). Portfolio landlords face more thorough assessment, including a review of all existing properties and their rental income.
Is a buy-to-let mortgage assessed on personal income or rental income?
Both. Lenders require rental income to cover the mortgage payment (typically at 125-145 per cent), but they also want to see a minimum personal income as a safety net. The exact weighting varies by lender.
Can a first-time buyer get a buy-to-let mortgage?
Most mainstream lenders require you to already own your own home. Some specialist lenders will consider first-time buyers for buy-to-let, but the criteria are stricter and rates tend to be higher. Seek advice from a broker before applying.