An average is a snapshot, not a quote
One figure can describe mortgages that completed months ago; another can describe products being advertised today. Knowing which you are reading makes the number far more useful.
What is the average buy-to-let mortgage rate?
It depends on what is being averaged. The latest quarterly UK Finance buy-to-let lending release available when this article was checked reported an average interest rate of 4.71% across new buy-to-let loans in Q1 2026. That is a historical measure of lending in that quarter, not an offer available to a new applicant today.
Average interest rate across new UK buy-to-let loans in Q1 2026.
UK Finance; published 15 July 2026. Completed lending measure.
Moneyfacts’ two-year / five-year fixed product averages at a maximum 75% loan-to-value on 1 August 2026.
Advertised product sample, not completed-loan data or a personal quote.
Those numbers are not a like-for-like trend. They cover different dates, products and populations. A lender’s current rate and conditions may have changed since either snapshot. See the UK Finance buy-to-let release and the Moneyfacts buy-to-let product table for their current publications and definitions.
Why do published averages disagree?
Loans taken out versus products advertised
A completed-loan average reflects borrowing that actually went ahead during a past period. A product average describes offers in a selected market sample on a specified day. Neither tells you which lender will accept your case.
Different product groups
An overall lending figure may include a mix of loan-to-value bands, rate types and deal lengths. A two-year fixed figure at a specified loan-to-value is narrower. Company borrowing, property type and product fees can change the options being compared.
Timing
A quarterly release follows the lending period. Advertised products may be repriced or withdrawn before you apply. Check the source date and the lender illustration before using a figure in a budget.
Interest rate versus rental yield
A mortgage rate is a borrowing cost. Gross rental yield is annual rent divided by property value before costs. They are different percentages; subtracting one from the other does not calculate profit or cash flow.
Watch for a misleading comparison: a lower headline interest rate can carry a higher product fee. The buy-to-let rates and total-cost page explains how to compare payments, fees and the balance at deal end using actual illustrations.
How should you use an average when planning?
Use it to frame a question, not to set a purchase limit or predict your lender’s decision. A useful comparison starts with the property and your borrowing plan.
1. Match the category
Identify whether the figure covers buy-to-let rather than residential lending, and whether it describes a fixed or variable product, a particular loan-to-value band, or completed loans.
2. Check the date and the full cost
Confirm that the product is still available and include any product, valuation, legal and advice fees. Ask what happens when the introductory deal ends and whether an early repayment charge matters to your plans.
3. Test eligibility before relying on a rate
Rent, lender valuation, property type, ownership, existing borrowing and credit history can affect the products available. The lender will apply its own rental assessment and evidence requirements. Read the buy-to-let criteria guide for that separate assessment.
If your current rental mortgage deal is ending, start with the buy-to-let remortgage guide and compare your lender’s switch option with any suitable remortgage. For a purchase, our deposit guide explains how the proposed loan and property value relate to loan-to-value.
Questions about average buy-to-let rates
Is the UK Finance average the rate I could get now?
No. It reports an average across new loans made in a past quarter. Today’s eligible products depend on current lender ranges and your case.
Why is an advertised fixed-rate average different?
It measures a different group of products at a different point in time. Check its loan-to-value band, deal period, fee assumptions and source date before comparing figures.
Does a lower-than-average rate mean a cheaper mortgage?
Not necessarily. Product and other fees, payment method, deal length, remaining balance and restrictions affect the total cost. Compare lender illustrations on the same basis.
Does rental yield tell me if the mortgage is affordable?
No. Yield is a property-income measure before some or all costs. A lender assesses rent and the application using its own current rules; your actual cash flow also needs voids, maintenance, insurance, tax and mortgage costs.
Ask about rates that may fit your situation
Tell Count Ready whether you are buying or remortgaging, the approximate value, loan and expected rent, and any deadline. An adviser can explain what must be checked before comparing current products. An initial discussion is not a mortgage offer or promise of acceptance.
Do not include bank statements, account numbers or identity documents in an initial callback message. Your property may be repossessed if you do not keep up repayments on your mortgage.