Calculator clusters

USFinCalc works best as a small network, not a pile of disconnected tools. Start with the decision in front of you, read the formula once, then move to the next calculator or guide that answers the follow-up question.

Income and tax

This cluster covers salary, withholding, RSUs, capital gains, and tax-advantaged benefits. The formulas are the familiar ones: marginal brackets for pay, supplemental withholding for equity, and basis plus holding period for investment gains.

Paycheck CalculatorTurn gross pay into take-home pay by state. RSU Tax CalculatorSee the real tax on vested equity and the withholding gap. Capital Gains Tax CalculatorCompare short-term and long-term gain treatment. HSA Tax Savings CalculatorModel the tax break from HSA contributions. Health Insurance OOP CalculatorEstimate annual out-of-pocket costs before enrollment.
Guide: Understanding Tax BracketsWhy marginal rates matter more than the top bracket headline. Guide: Take-Home Pay by StateHow state tax changes the number that lands in your account. Guide: RSU Taxes ExplainedThe 22% withholding trap in plain English.

Loans

This cluster starts with loan amount, rate, term, and any extra costs that lenders roll into the payment. Mortgage math uses amortization plus escrow items. Auto and student loans use the same payment backbone, with different inputs around taxes, trade-ins, and extra principal.

Mortgage CalculatorFull PITI with PMI and HOA included. Home Affordability CalculatorWork backward from income to a realistic price range. Closing Cost CalculatorEstimate the cash needed to close on a home. Auto Loan CalculatorMonthly payment with tax, trade-in, and down payment. Student Loan CalculatorStandard payment and the cost of paying extra.
Guide: How PMI WorksWhy less than 20% down adds private mortgage insurance. Guide: The 28/36 Rule ExplainedThe debt-to-income math lenders use for housing. Guide: How Much Car Can I Afford?The 20/4/10 rule and the hidden cost of term length. Guide: Student Loan Payoff StrategiesAvalanche, snowball, and when extra payments help most.

Retirement and savings

This cluster uses compound growth, contribution limits, employer match formulas, and simple break-even math. It is the place to go when the question is not just what a decision costs now, but what it changes over years or decades.

Retirement CalculatorProject 401(k) and IRA growth with employer match. Social Security Break-Even CalculatorCompare claiming ages using break-even timing. 529 College Savings CalculatorSee how monthly saving meets future tuition. Emergency Fund CalculatorTarget months of expenses based on your risk profile.
Guide: Maximize Your 401(k) MatchHow matching formulas work and why skipping them is expensive. Guide: 529 Growth ProjectionsHow time, fees, and contributions shape the balance. Guide: 529 Qualified ExpensesWhat the account can pay for tax-free.

Adjacent clusters

These topics sit just outside the three main families, but they still plug into the same decision flow. Use them when a home, energy, or life decision needs a number before it needs a spreadsheet.

Solar PaybackHow long solar takes to pay back under real rates. EV vs GasCompare fuel and ownership cost over time. Heat Pump SavingsModel the swap from fossil heat to efficient electric heat. Home Battery ROISee if storage pencils out for your home. Wedding BudgetAllocate a total budget across the pieces that matter.

Frequently asked questions

What is the point of the cluster page?
It keeps the next useful tool one click away, so a result can lead into the calculator or guide that answers the follow-up question.
Do I need to understand the formula first?
No. Each calculator shows the result first and the math right after, so you can get the answer and then inspect the assumptions.
Where should I start if I only have a vague question?
Start with the cluster that matches the decision: income and tax for pay, loans for borrowing, and retirement and savings for long-term planning.

Related tools

HomeReturn to the main calculator landing page. GuidesRead the plain-English explainers behind the formulas. Mortgage CalculatorA good first stop for home purchase planning. Paycheck CalculatorThe quickest way to see take-home pay by state.