Rate Switch vs Full Switch: Which One Do You Actually Need?
19 March 2026 · Mary Molloy Solicitors
Two different products hide behind the word switch. An internal rate switch changes your rate with your existing lender: a form, perhaps a valuation, no solicitor, done in weeks. A full switch moves the loan to a new lender: a complete conveyancing transaction with deeds, undertakings and registration. Choosing between them is the first decision in any remortgage.
The internal switch: cheap, fast, limited
If your loan-to-value has improved or your lender's rates have moved, an internal switch to a better band or product can capture much of the available saving at essentially no cost. Its limit is obvious: you can only reach the rates your own lender chooses to offer existing customers, and lenders reserve their sharpest pricing and cashback for new business.
The full switch: the whole market, with legal work
A full switch opens every lender's book, including cashback offers that typically more than cover the legal and valuation costs. The price is the process: a remortgage takes months rather than weeks, involves a solicitor certifying your title, and surfaces any paperwork gaps your property carries. For a meaningful rate gap on a meaningful balance, that process pays for itself many times over.
The right order of operations
First, ask your current lender in writing for its best available rate for your situation — this is your benchmark and costs nothing. Second, compare the market against that benchmark, netting cashback against switching costs and any break fee. Third, if the full switch wins, instruct your solicitor at application stage so the deeds request runs while the bank underwrites. Doing it in this order means you never pay for legal work an internal switch would have made unnecessary.
Read more in our main guide: Switching Lender: The Legal Side of Moving Your Mortgage · or back to the blog.
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