Borrowing Calculators
Understand the true cost of borrowing — monthly payments, total interest, amortization schedules, and the fine print on mortgages, auto loans, student loans, and credit cards.
27 free calculators in this category
Mortgage
→Monthly payment, full amortization schedule, the true lifetime cost of interest, and how extra payments shorten your loan.
Loan
→Payment, total interest, and payoff timeline for any fixed-rate loan, with an amortization breakdown.
Payment
→The monthly payment on any fixed-rate loan — plus total interest, the true APR once fees are counted, and a full amortization schedule with extra-payment savings.
Business Loan
→Monthly payment, total cost, and effective APR on a business loan — with origination fees folded in and a full amortization schedule so you can compare offers honestly.
Credit Card
→See how long a fixed payment takes to clear your balance — and how the shrinking minimum-payment trap costs you years and thousands in interest.
Debt Payoff
→Compare the snowball and avalanche strategies across all your debts — payoff order, total interest, and which one frees you sooner.
Refinance
→Whether refinancing pays off: the new payment, the break-even point on closing costs, and the term-reset interest trap.
Affordability
→How much house you can afford using real front-end and back-end DTI ratios — and which one is actually limiting your budget.
Rent vs Buy
→A true opportunity-cost comparison: invested down payment, appreciation, full ownership costs, and the year buying pulls ahead.
Auto Loan
→The real out-the-door cost — sales tax with the trade-in credit, fees, and the negative-equity timeline showing when you stop being underwater.
Balance Transfer
→Whether a 0% balance transfer pays off once the fee and the go-to APR are counted — plus the payment to clear it before the promo ends.
DTI
→Your front-end and back-end DTI, the lender qualification band you fall in, and how much debt headroom you have before 36% and 43%.
Loan Payoff
→Pay off an existing loan faster — compare extra, biweekly, and lump-sum strategies, or solve the payment to be debt-free by a target date.
HELOC
→Your available credit from home equity, and the payment shock when the interest-only draw period flips to amortizing repayment.
Student Loan
→Standard repayment vs an income-driven plan based on your discretionary income — the lower payment and the long-term tradeoff.
Amortization
→A full month-by-month amortization schedule with the principal-vs-interest crossover, extra payments, and CSV export.
Car Affordability
→How much car you can responsibly afford using the 20/4/10 rule — counting insurance and fuel, not just the loan payment.
SBA Loan
→Payment and true cost of an SBA business loan, including the SBA guarantee fee and the long terms SBA financing allows.
Mortgage Points
→Whether buying discount points pays off — the upfront cost, the lower payment, and the break-even month you must pass to win.
PMI
→Your monthly PMI and the full cancellation timeline — the 80% point you can request it gone and the 78% automatic cutoff.
FHA Loan
→FHA payment with upfront and annual MIP — including the catch that with under 10% down, MIP never cancels for the life of the loan.
Closing Costs
→An itemized estimate of buyer closing costs — and the total cash to close you actually need to bring to the table.
Lease Buyout
→Whether buying out your car lease is smart — the all-in buyout cost vs the car’s market value, and the equity it captures.
Payday Loan
→Turns a small-sounding fee into its true APR (often 400%+), models the rollover trap, and compares the cost to safer credit.
DSCR
→Qualify a rental on its cash flow: the DSCR from rent and expenses, whether it clears the lender target, and the max loan it supports.
Cash Advance
→The true cost of a credit-card cash advance — the fee, the higher APR, and the no-grace-period interest that starts on day one.
Money Factor
→Convert a car lease money factor to its equivalent APR (and back) — multiply by 2400 — so you can compare lease financing against a loan on equal terms.