Child Support Calculator (Income Shares Model)

Applies the income-shares model — the framework used by most US states — using the published Michigan Child Support Formula 2025 schedule. Shows the combined obligation, each parent's share of it, the parenting-time offset and the child-care, health-premium and extraordinary-medical add-ons, line by line.

Planning a deposit, a safety net or a large purchase: how much to put aside each month, and how long a target takes at a given rate.

Reading a nominal rate as if it were real. Inflation is subtracted from the return, not from the capital, so a 3% account during 4% inflation loses purchasing power every year.

They sit next to each other but answer different questions: Alimony / Spousal Support Calculator is the one to open when you need it to runs three published US guideline formulas side by side — the AAML 2007 guideline, the New York statutory maintenance formula and the Massachusetts Alimony Reform Act — so the spread between them is visible. Models the duration limits and the 2017 Tax Cuts and Jobs Act split: agreements executed after 31 December 2018 are no longer deductible to the payer nor taxable to the recipient. Pick whichever matches what you're starting from — both are free.

Cost of Raising a Child Calculator is the closest one after this: Builds on the USDA Expenditures on Children by Families tables (2015 data, the last edition published), restated in today's money and projected forward at your inflation rate. Applies the economies of scale the source measured — an only child costs 27% more, a third child 24% less — and optionally adds four years of college.

Income tax calculator and 529 College Savings Calculator — they come up in the same task often enough to be worth a second tab.

Compound interest is arithmetic, so the maths is exact for the rate you enter. Real accounts vary in compounding frequency, tax treatment and whether interest is credited before or after a deposit.