AccuFin Tools

Free Financial Calculators

AccuFin Tools provides free, accurate financial calculators for mortgages, insurance, and business taxes — paired with plain-language guides that explain the numbers behind the math.

Calculators

Auto Insurance Estimator
Estimate your car insurance costs by state, age, and vehicle type
Refinance Calculator
Find out if refinancing your mortgage will save you money
Life Insurance Calculator
Calculate how much life insurance coverage you need
LLC Tax Estimator
Compare tax implications of Sole Prop vs LLC vs S-Corp
Mortgage Calculator
Calculate monthly payments with taxes, insurance, and PMI

Guides

Plain-language explanations of the financial concepts behind each calculator — so you understand what the numbers mean, not just what they are.

Understanding Mortgage Amortization
How your payment splits between principal and interest, and how extra payments save thousands
How Much Life Insurance Do You Need?
The DIME method explained — debt, income, mortgage, and education coverage gaps
LLC vs S-Corp: A Complete Tax Comparison
When S-Corp election saves money on self-employment tax and how to make the switch
What Affects Your Car Insurance Rate?
State-by-state factors, coverage decisions, and strategies to lower your premium
When Should You Refinance Your Mortgage?
Break-even math, closing costs, and the hidden cost of resetting your amortization

Why AccuFin Tools?

Every calculator uses publicly available data and industry-standard formulas — NAIC insurance averages, IRS tax brackets, standard amortization math. No email required, no data stored, no upsells. Just the calculation and the context to understand it.

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