CREDIT CARDS / PROMO CHECK
Compare simple interest during a promotional transfer period with current-card interest after including the transfer fee and promotional rate.
Use boundary
The model compares simple interest on a stable balance during the same period, then subtracts the transfer fee and promotional interest from the avoided current-card interest.
Estimated saving = current simple interest - transfer fee - promotional simple interest.
What you provide
What you receive
Use boundary
Payment timing, new purchases, grace periods, allocation rules, residual interest, and the post-promo rate are not modelled.
This is an educational planning estimate. Confirm lender, issuer, tax, accounting, and contractual rules with the relevant provider or qualified adviser before acting.