Step 1: Audit Your Current Deal
Start by gathering the numbers on your existing mortgage:
- Current interest rate and product type (fix, tracker, variable).
- Deal end date — the date your current rate reverts to SVR.
- Early repayment charge (ERC) percentage and remaining months covered.
- Current balance and term remaining.
- Product fees already paid (some can be reclaimed if you're within a cooling-off window).
If your current deal ends in more than 6 months, check the ERC carefully. Breaking a 2% ERC on a £200,000 loan costs £4,000 — you'd need a much better rate on the new deal for that to be worth it. A broker can model the net benefit of breaking early vs waiting.
If you're already on SVR (7%+), you're almost certainly losing money by staying there — a remortgage will pay for itself within months.
Step 2: Understand Your Property and Tenant Position
Collect the property and tenancy evidence lenders will need:
- Current AST with start date, end date and rent.
- Last 6 months of bank statements showing rent receipts into your account.
- Current EPC (minimum E required; C or better is increasingly preferred).
- Current gas safety certificate (CP12) and EICR (5-yearly).
- HMO licence if applicable.
- Planning documents if the property has been subject to change-of-use.
This is also a good moment for an honest look at the rent. If you're £100/month below market rate because you haven't raised rent in 3 years, the ICR calculation at remortgage uses the actual rent, not the market rent. Review rents pragmatically before remortgaging — a Section 13 or renewal-triggered increase to market rate can materially increase what you can borrow.
Step 3: Get Your Personal and Portfolio Paperwork Ready
BTL underwriting always includes personal/director checks even on limited company applications. Assemble:
- Photo ID and recent proof of address.
- Last 3 months' personal bank statements.
- Last 3 months' payslips + P60 (if employed), or last 2 years' SA302s and tax year overviews (if self-employed).
- Proof of minimum £25,000 personal income (where lender requires it).
If you're a portfolio landlord (4+ mortgaged BTLs), also prepare:
- Full portfolio schedule — every property with address, value, balance, rent, rate and lender.
- Asset and liability statement.
- Business plan (1-2 pages).
For limited company BTLs, add: last 2 years' filed accounts, CT600s, company bank statements, and a current Companies House print-out showing SIC codes.
Step 4: Engage a Specialist BTL Broker
BTL remortgaging is broker territory. Direct-to-consumer rates rarely beat intermediary rates, and the nuances of portfolio, limited company, HMO and adverse credit cases are genuinely hard to navigate alone.
Questions to ask a prospective broker:
- Are you whole-of-market, or do you only access a panel?
- How many BTL cases do you place per month? (More = sharper knowledge of current criteria.)
- Do you place limited company / HMO / portfolio cases regularly?
- What's your fee structure — and is it offset by lender procuration fees?
- Can you run a soft-search AIP before committing to a full application?
Most specialist BTL brokers offer a free initial consultation and ICR assessment. That's often enough to identify 2-3 strong lender candidates before any hard credit searches happen.