Treat the move as a new lending decision
The existing lender reassesses the applicants and new property. If you need more borrowing, the extra amount may sit on another product with a different rate and end date. Sale and purchase dates can also affect whether any early repayment charge is paid and later refunded.
How I approach the case
We begin with what you want to achieve, your timescale and any part of the case that needs explaining. I review the evidence and suitable lender routes, then explain the available options and their costs. A recommendation follows the individual assessment; an initial conversation does not commit you to an application.
Where legal, tax or other specialist advice is needed, we identify it early so the finance fits the wider transaction. Tell me about any change in employment, borrowing, deposit or property details before proceeding.
What to prepare
- Current mortgage statement
- Product, rate and early repayment charge
- Sale price and new purchase details
- Extra borrowing required
- Target sale and completion dates
You do not need every document before saying hello. Start with a short outline; detailed or sensitive records should follow through an agreed secure route.
Portability does not guarantee approval or preserve every term. Check application deadlines, early repayment charges and what happens if the sale and purchase do not complete together.
Your questions, answered
What should I budget for beyond the deposit?
Build a separate allowance for legal work, a survey, any property tax, moving and immediate repairs. Then consider the monthly mortgage alongside bills, insurance and existing commitments. A budget with some room left over is more useful than a purchase price on its own.
How do we compare mortgage options?
We consider the amount borrowed, the term, repayment method, initial rate period, fees and flexibility together. Tell me if you expect to move, make overpayments or change your working pattern. A lower initial payment does not, by itself, establish that a mortgage is the right fit.
What can change between our first conversation and completion?
A different purchase price, property issue, change in income or new borrowing can affect the assessment. Keep me informed before making a commitment. A lender’s initial indication is followed by its full checks, valuation and offer conditions.
Further reading: MoneyHelper: mortgages and homebuying. Content reviewed 17 September 2026. General information; availability depends on the individual case.