Low rate with a big fee, or higher rate with none?
The lowest headline rate is often attached to a large arrangement fee, and the fee-free alternative usually carries a slightly higher rate. Which is cheaper depends almost entirely on your balance: on a large mortgage the sharper rate usually wins, because the saving outweighs the fee; on a smaller one the fee-free deal frequently wins. Compare total cost over the deal, not the rate on the poster.
Why the cheapest rate often isn’t the cheapest deal
Answer first: because the market-leading rate is usually attached to a large arrangement fee. That’s not a trick — it’s how the pricing works. A headline-grabbing rate wins attention and business; the fee is how the lender recovers its margin.
Which means the deal at the top of a comparison table is frequently not the cheapest deal for you. The only way to know is to compare total cost over the deal period, and that comparison regularly overturns the ranking entirely.
The maths, in plain terms
Two deals. Deal A has a sharper rate and a substantial arrangement fee. Deal B has a slightly higher rate and no fee.
Deal A’s lower rate saves you a certain amount each month. Multiply that monthly saving by the number of months in the deal. If that total exceeds the fee, Deal A wins. If it doesn’t, Deal B wins.
That’s the whole calculation — and the variable that decides it is your balance.
On a large mortgage, a small rate difference produces a large monthly saving, which easily outruns even a hefty fee. The sharp rate usually wins.
On a smaller mortgage, the same rate difference produces a modest monthly saving — which a large fee can swallow whole. Fee-free usually wins.
There’s no universal answer, only your answer. Run both through the repayment calculator and compare the totals rather than the rates.
Should you add the fee to the loan?
Most lenders let you. It eases the immediate cash-flow hit, which can genuinely be the right choice if paying upfront would leave you uncomfortably short.
But be clear about what it costs. Adding the fee to the loan means paying interest on it — for the whole deal, and potentially for the whole remaining term if you never clear it. A fee added at the start of a long mortgage can end up costing far more than its face value.
So: pay it upfront if you comfortably can. Add it if the alternative is straining your finances. Just don’t mistake “added to the loan” for “free” — it’s a deferred cost with interest attached, not a discount.
Fee-free remortgage deals
On remortgages specifically, lenders compete hard for your business, and fee-free deals are common. These typically cover the valuation and the legal work as well as waiving the product fee — which removes almost the entire upfront cost of switching.
That’s a bigger deal than it sounds. It means the practical barrier to leaving your lender is close to zero, which strips away the main excuse for drifting onto the standard variable rate. If cost was the reason you hadn’t switched, check whether a fee-free deal removes it. The full breakdown is in remortgage costs and fees, and the remortgage calculator will show the saving.
The trade-off, as ever: a fee-free deal often carries a slightly higher rate to compensate. On a small balance that’s usually still the winner; on a large one, less so. Same maths, applied to your numbers.
The other costs to fold in
A complete comparison isn’t just rate plus product fee. Depending on the deal, you might also count a valuation fee, legal costs, an exit or deeds-release fee from your old lender, and — if you’re leaving a deal early — an early repayment charge.
The ERC is the one that dwarfs everything else when it applies. If you’re mid-deal, it can easily exceed the entire benefit of switching, which is why timing your remortgage around your deal end date matters more than shaving basis points off a rate.
The contractor angle
One more filter, and for you it’s the first one, not the last.
Before you optimise fee-versus-rate, make sure you’re comparing deals from lenders that will actually lend to you. A beautifully priced product from a lender that assesses you on minimised tax-return profit — and won’t lend enough — isn’t a deal you’re choosing between. It’s a deal you can’t have.
So the sequence is: find the lenders that apply contract-based underwriting to your gross day rate, then run the fee-versus-rate comparison among their products. Optimising the second step before the first is how contractors waste weeks and collect hard credit searches for nothing.
The bottom line
The lowest rate usually carries the biggest fee, and whether it’s genuinely cheaper depends on your balance: large mortgages favour the sharp rate, smaller ones frequently favour fee-free. Compare total cost over the deal — payments plus fee plus any valuation and legal costs — rather than the number on the poster. Pay the fee upfront if you can, since adding it means paying interest on it for years. And as a contractor, filter for lenders that read your income first. Speak to an adviser.
Correct at 11 July 2026 and liable to change. This is general guidance, not a recommendation for your situation.
- Market-leading rates often carry a large arrangement fee — that's how they're priced.
- The right comparison is total cost over the deal period, not the headline rate.
- On a large balance, a lower rate with a fee usually wins; on a small one, fee-free often does.
- Adding the fee to the loan eases cash flow but means paying interest on it for years.
- Fee-free remortgage deals often also cover valuation and legal costs.
Rates, answered
Why do the lowest mortgage rates have big fees?+
Because the fee is how the lender recovers margin. A market-leading rate attracts attention and business; the arrangement fee makes it commercially viable. That's why the cheapest rate on a comparison table often isn't the cheapest deal once the fee is counted.
Should I add the fee to my mortgage or pay it upfront?+
Paying upfront is cheaper overall, because adding it to the loan means paying interest on the fee for the rest of the deal — and sometimes the whole term. Adding it eases immediate cash flow, which can be the right trade-off, but it's a real cost, not a free option.
How do I know which deal is actually cheapest?+
Work out the total cost over the deal period: the monthly payments across the fixed term, plus the fee, plus any valuation or legal costs. Compare that single number between deals. It's the only comparison that answers the question, and it frequently overturns the headline ranking.
Are fee-free deals worth it?+
Often, particularly on smaller balances, and particularly on remortgages where fee-free deals also cover valuation and legal work. The slightly higher rate can easily cost less than a large fee would. On big balances, the maths usually flips the other way.