Money

Organize current-year and prior-year days, test a weighted presence threshold and estimate the tax-rate difference on foreign income.

Run the 50/30/20 family budget rule, baby shower and back-to-school budgets, stacked discounts and private university costs — all on one single page.

Estimate a starting coverage need for life, auto liability or home property insurance, then compare premiums and the deductible cash you would need.

Federal withholding per paycheck, your refund or balance due, what a bonus or overtime really nets, the self-employment tax on 1099 income, and what an employee actually costs an employer — all on the current IRS and SSA figures.

See what a lump sum or a monthly contribution grows to, how long it takes to double, what a return is worth after inflation, how big an emergency fund you need, and how to split and size a portfolio — with Sharpe ratio, position sizing and bond duration.

Work out how much you can contribute to a 401(k), IRA and HSA this year, whether Roth or traditional wins at your tax rates, what Social Security pays at 62, 67 or 70, your required minimum distribution, and which Medicare IRMAA bracket your income lands in.

One calculator for the three big home-loan decisions: how much a refinance really saves after closing costs, how much time and interest an extra monthly payment buys, and what a HELOC would cost you per month.

Work out what a crypto position actually earned after buy and sell fees: cost basis, net proceeds, total and annualised return, break-even price, the short-term or long-term tax line, plus the cost of stablecoin swaps, bridges, perpetual funding and impermanent loss in a pool.

Work out the minimum hourly rate that actually pays your target income, how much self-employment, federal and state tax a side hustle owes, what to send in each quarter, and what an hour-long meeting costs in labor.

See exactly what paying only the minimum costs you, how many months a fixed payment takes, and how much the avalanche method saves over the snowball on your real balances and APRs.

Add or back out sales tax on a purchase, estimate annual property tax on a home by state, work out a vehicle personal property tax bill in Missouri or Virginia, and calculate the capital gains tax on a sale.

Compare a scheduled student-loan payment, total interest, an extra monthly payment and an income-based planning scenario in one place.

Add up what a rental actually costs: first month, security deposit, application and pet fees, renters insurance, HOA or condo charges and the moving truck — then see the true monthly cost, whether it passes the 30% rule, and how much of the deposit you should get back.

Estimate the real cost of an imported product after freight, insurance, duty, import tax and handling fees — then test a resale margin.