Pro Calculators and Guides
How to Use RSU Vesting Tax Withholding Calculator Online for Free: Step-by-Step Guide
Check whether the tax withheld on your vesting RSUs covers what you will owe. Free, private and no sign-up.
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Pro Calculators and Guides
Specialist calculators are only useful when you understand the rules behind the numbers. These guides explain what each professional calculator does, which inputs matter, how to read the result and where the official rules come from, covering payroll and tax, immigration and visas, housing, business compliance, engineering and science. Every guide links to a free tool that runs in your browser and keeps your figures private.
318 guides
Pro Calculators and Guides
How to Use Section 179 and MACRS Depreciation Calculator Online for Free: Step-by-Step Guide
Compare a Section 179 deduction, bonus depreciation and MACRS for equipment you buy. Free, private and no sign-up.
Pro Calculators and Guides
How to Use Home Seller Net Sheet Calculator Online for Free: Step-by-Step Guide
Estimate the cash you walk away with when you sell a home, and the capital gains tax. Free, private and no sign-up.
Pro Calculators and Guides
How to Use Social Security Break-Even Age Calculator (62 vs 67 vs 70) Online for Free: Step-by-Step Guide
Compare claiming Social Security at 62, full retirement age or 70 and see the break-even ages. Free, private and no sign-up.
Pro Calculators and Guides
How to Use Social Security Taxable Benefits Calculator (Provisional Income) Online for Free: Step-by-Step Guide
Find how much of your Social Security benefit is taxable from your provisional income. Free, private and no sign-up.
Pro Calculators and Guides
How to Use Solo 401(k) and SEP IRA Contribution Calculator Online for Free: Step-by-Step Guide
Calculate how much a self-employed person can put into a solo 401(k) or a SEP IRA. Free, private and no sign-up.
Pro Calculators and Guides
How to Use Spousal Social Security Benefit Calculator Online for Free: Step-by-Step Guide
Estimate a spouse's Social Security benefit from the other spouse's record, including early claiming reductions. Free, private and no sign-up.
Pro Calculators and Guides
How to Use Stair Stringer Calculator (Rise and Run) Online for Free: Step-by-Step Guide
Work out the number of risers, riser height, treads and stringer length for a staircase. Free, private and no sign-up.
Pro Calculators and Guides
How to Use Standard Mileage vs Actual Car Expenses Calculator Online for Free: Step-by-Step Guide
Compare the IRS standard mileage rate with actual vehicle expenses for business driving. Free, private and no sign-up.