F FeeFriction

Calculators

Built for high-intent US finance searches. Transparent assumptions. No fake product ratings. No loan offers.

Tier S — core RPM

Mortgage Refinance Break-Even Calculator

Estimate how many months until refinance closing costs are recovered from a lower rate — US educational tool.

Personal Loan True Cost Calculator (APR + Fees)

See total interest and fees on a personal loan — not just the monthly payment. Educational APR math for the US.

Credit Card Interest & Payoff Calculator

Compare minimum payments vs a fixed payoff plan and estimate interest drag on US revolving balances.

401(k) Fee Drag Calculator

Estimate how expense ratios and admin fees compound against your retirement balance over decades.

US Paycheck Take-Home Calculator (Federal + FICA + State)

Estimate take-home pay after federal income tax, Social Security, Medicare, and a simplified state tax rate — educational US tool.

Tier A — adjacency

HELOC Interest Cost Calculator

Estimate annual and monthly interest on a home equity line draw — US educational HELOC math (not an offer).

Bank Account Fee Leak Calculator

Add monthly maintenance, ATM, overdraft, and wire fees into an annual “leak” total for a US checking account.

Auto Loan True Cost Calculator

Estimate monthly payment, total interest, and financed amount after down payment, tax, and fees on a US auto loan.

International Remittance Total Cost Calculator

Combine fixed transfer fees and FX markup to estimate the true cost of sending money abroad from the US.

Tier B

Inflation vs Raise Calculator

See whether a raise beats inflation — estimate purchasing-power change using CPI-style assumptions.