Monthly payment is useful for cash flow, but it can hide total cost. A longer term often lowers the payment while increasing the total interest paid.

APR is designed to include interest plus certain borrowing costs, so it is usually a better first comparison point than interest rate alone.

Origination charges, points, application fees, and closing costs can change which offer is cheaper. Put each fee into a side-by-side table before deciding.

If one offer has a lower rate but higher upfront cost, calculate how long it takes for the monthly savings to recover that cost.

Use the same principal and compare each offer's rate and term. Total interest shows the lifetime borrowing cost if you keep the loan until payoff.

If you expect to sell, refinance, or repay early, also compare cost over that expected holding period.

Break-even months = upfront refinancing cost divided by monthly payment savings. If you expect to keep the loan for fewer months than the break-even point, the refinance may not recover its cost.

This simple break-even check should be reviewed with taxes, points, and lender-specific fee treatment when those details matter.

Open the loan calculator, enter offer A, record monthly payment and total interest, then reset and enter offer B.

For refinance checks, model the new loan using the remaining balance, new rate, and new term. Add closing costs separately because the calculator focuses on principal and interest.