MACRS Depreciation Calculator
IRS MACRS General Depreciation System (GDS) using the half-year convention.
Inputs
How it works
MACRS applies the IRS-published percentage table to the cost basis each year. GDS half-year convention assumes assets are placed in service mid-year, so first- and last-year percentages are smaller.
Frequently asked questions
Are these amounts an exact tax bill?
No. They use verified 2026 IRS/SSA figures but ignore credits, phase-outs and AMT. Use tax software or a CPA to file.
Marginal vs effective rate?
Marginal is the rate on your next dollar. Effective is total tax ÷ taxable income — always lower because earlier brackets fill first.
Standard or itemized?
Take whichever is larger. 2026 standard deduction: Single $16,100 · MFJ $32,200 · HoH $24,150 · MFS $16,100.
How is state tax handled?
Eight states impose no income tax. The rest are approximated at their top rate — see your state's brackets for a precise figure.