Step 1: Review Your Current Deal
Start by checking when your current mortgage deal expires and what early repayment charges (ERCs) apply if you leave early. Look at the rate you are paying, the remaining term, and the current balance. Compare these against what is available in the market to determine whether switching makes financial sense.
If your deal has already expired and you are on the lender's SVR, you are almost certainly paying more than necessary. Even a modest rate reduction on a buy-to-let mortgage balance of £150,000 can save hundreds of pounds per month.
Step 2: Gather Your Documents
Buy-to-let remortgage applications require more documentation than residential ones. Prepare your current mortgage statement, proof of rental income (tenancy agreement or letting agent rental assessment), personal income evidence, tax returns or SA302 forms, and details of any other properties you own.
If you are a portfolio landlord (four or more mortgaged BTL properties), you will also need a comprehensive portfolio schedule. Having everything ready before you start saves significant time and reduces the chance of delays.
Step 3: Compare Deals and Apply
A specialist BTL mortgage broker can search the market and recommend the most competitive deals for your circumstances. They will consider the interest rate, fees, product features (such as overpayment allowances and portability), and how different lenders assess rental coverage.
Once you have chosen a deal, the broker submits your application. The lender will carry out a property valuation — either a desktop assessment using property data or a physical inspection — and underwrite your case. This typically takes two to four weeks for straightforward applications.
Step 4: Complete the Switch
After approval, your solicitor (or the lender's free legal service, if offered) handles the legal transfer from your old lender to the new one. This includes paying off the existing mortgage, registering the new lender's charge with the Land Registry, and transferring any deeds.
The entire process from application to completion typically takes four to eight weeks. Once complete, your new monthly payment begins, and you should immediately check that it is correct and set up a direct debit if required.
Important: Your home may be repossessed if you do not keep up repayments on your mortgage. There will be a fee for mortgage advice. The actual rate available will depend on your circumstances. Think carefully before securing other debts against your home.