About these calculators
Each tool is built directly from IRS guidance — fact sheets, form instructions, and the underlying statute — for the deductions and credits enacted or changed by the One Big Beautiful Bill Act (P.L. 119-21) for tax years 2025 through 2028. We show the cap, the income phase-out, and a worked example for every calculator, and we cite the IRS source on each page.
These are estimates for planning, not tax advice. Some 2026 figures come from proposed regulations and may change before filing. Always confirm your specific situation with a qualified tax professional or the official IRS forms.