What is the Balance Transfer Calculator?
Moving a loan to a lender offering a lower rate can save a real amount of money, but the saving is never the full difference between the two rates. Transfers carry costs — processing fees, legal and valuation charges, sometimes a foreclosure fee on the old loan — and those have to be cleared before you are ahead.
This calculator compares your current loan against a proposed one so you can see whether the switch is worth making, and roughly how long it takes for the saving to cover the cost of making it.
What each input means
- Outstanding loan balance
- The principal still owed on your current loan, from your latest statement. This is the amount the new lender takes over.
- Current interest rate
- What your existing loan charges today, after any resets on a floating rate.
- Rate offered by the new lender
- The rate in the new lender's sanction letter. Check whether it is an introductory rate that resets after a set period.
- Remaining tenure
- The time left on your current loan. The comparison keeps the tenure the same, so the saving shows up as a lower EMI.
- Cost of switching
- Processing, legal, valuation and any other one-time charges. The transfer only pays if the interest saved is larger than these costs, and the result shows how many months that takes.
How this calculation works
Interest is charged on the outstanding balance, so a lower rate reduces every future interest charge. The gross saving is the difference in total interest across the remaining term.
The net saving is what remains after transfer costs. Because those costs are paid upfront and the saving accrues monthly, there is a break-even point. Transfer late in a loan's life and the remaining interest may be too small for the saving to ever cover the fees.
Formula: Net saving = interest left at the current rate − interest at the new rate − switching costs
Getting the most out of the result
- Compare total interest over the remaining term, not the two rates or the two instalments.
- Add every cost of switching — processing, legal, valuation, stamp duty where applicable, and any foreclosure charge on the existing loan.
- Keep the tenure the same when comparing. A new lender offering a lower instalment on a longer term may be more expensive overall.
- Ask your current lender to match the offer first. Retention pricing is common and costs you nothing to request.
- Be wary of teaser rates that reset after a short period. Check what the rate becomes afterwards.
Common mistakes to avoid
The pervasive error is comparing instalments instead of total cost, which makes any term extension look like a saving. Borrowers also forget to include transfer costs, so a switch that looks worthwhile on paper takes years to break even. Transferring late in a loan is a related trap — by then most of the interest has already been paid and there is little left to save. And a top-up taken at the same time as a transfer increases the debt, when the point of switching was to reduce its cost.
Frequently asked questions
When is a balance transfer clearly worth it?
When a meaningful rate gap coincides with a substantial remaining term and modest transfer costs. Early in a long loan the case is strongest; in the final years it rarely justifies the effort.
What does a transfer typically cost?
Commonly a processing fee on the new loan, plus legal and valuation charges for a secured loan, and possibly a foreclosure charge on the existing one. Total them and compare against the projected saving before deciding.
How do I find the break-even point?
Divide the total transfer cost by the monthly saving. The result is roughly how many months you must keep the loan before the switch pays for itself. If that exceeds how long you expect to hold the loan, it is not worth doing.
Does transferring restart my loan?
It is a new loan with the new lender, and if the term is reset to its original length you will pay considerably more interest despite the lower rate. Insist on keeping the remaining term unchanged.
Will a transfer affect my credit score?
The application involves a credit check and closing the old account changes your credit profile slightly. Both effects are usually minor if repayments have been made on time.
Should I take the top-up loan offered with the transfer?
Only if you need the money for something specific and worthwhile. It is additional borrowing, and taking it during a transfer means the switch no longer reduces your debt at all.
Can my current lender simply lower my rate?
Often yes. Lenders would rather reduce a rate than lose the account, and many have a formal process for it. Ask before going through the cost and effort of a full transfer.