Charitable Donation Tax Deduction Calculator

How it works

The calculator compares two paths to see which yields larger deductions: itemizing or claiming the standard deduction. Under Public Law 119-21, itemizers can deduct cash gifts only above a floor of 0.5% of AGI. For a household with $150,000 of AGI, that floor is $750. A $500 gift falls below that threshold, so itemizing deducts nothing from it. If you do not itemize, the law provides a cash deduction of up to $1,000 for single filers or $2,000 for married couples filing jointly. The tool takes the larger of the two overall deduction totals and subtracts what you would receive without giving. You can review the general trade-offs in our standard vs itemized deduction guide.

Cash gifts to churches and other public charities are generally capped at 60% of AGI under IRS Publication 526. For an income of $150,000, that annual ceiling is $90,000. In our internal modeling, we ran the calculator's own formula on several scenarios to see when donations change the tax bill. For a married couple with $150,000 AGI and no other deductions, giving $1,500 in cash adds $1,500 through the non-itemizer allowance, saving $330 at a 22% rate. When the same couple gives $500, the cash allowance deducts the full $500, which saves $110 at that 22% rate. For a single filer with $20,000 AGI, $20,000 of other deductions, and a $15,000 cash gift, the 60% limit caps deductible giving at $12,000. Subtracting the $100 floor leaves $11,900 deductible.

The tool also runs a two-year bunching test to compare steady giving against concentrating two years of gifts into one tax year. In our internal modeling, the married couple giving $12,000 each year receives $68,400 in total deductions over two years. If they instead bunch $24,000 into year one and give nothing in year two, they itemize $43,250 in year one and claim the $32,200 standard deduction in year two. That creates $75,450 in total deductions, adding $7,050 in deductions and saving about $1,551 at a 22% rate. For a single filer with $90,000 AGI, $18,000 of other deductions, and a $6,000 gift, bunching adds $450 in deductions, saving about $108 at a 24% rate. However, bunching can lose deductions when the concentrated gift exceeds the 60% limit, because the excess is not deductible that year. For the single filer with $20,000 AGI, bunching $30,000 into one year is capped at $12,000, leaving them with $51,900 in total deductions compared to $63,800 when giving evenly.

This tool models cash gifts to a church or public charity and covers federal income tax only. It leaves out non-cash property, appreciated stock, carryovers, the extra standard deduction for age 65 or older, and the senior deduction. Gifts to donor-advised funds do not qualify for the non-itemizer cash allowance, as detailed in our donor-advised funds explainer. The calculator applies the 60% cap before subtracting the 0.5% floor, though the IRS has not published a final worksheet confirming that ordering for 2026. If you need to check your marginal bracket, use our tax bracket calculator.

Based on our internal modeling and the IRS 2026 figures above, giving adds only the $1,000 or $2,000 cash allowance for most households under the 2026 standard deductions, unless your other deductions already approach the standard threshold. Giving evenly remains the safe baseline, while bunching helps when two years of gifts lift your itemized deductions above the standard deduction without exceeding 60% of your AGI. A bunched gift that exceeds 60% of AGI loses its deduction on the excess amount, and households far below the standard deduction gain nothing from the strategy. If you give cash to a qualified congregation, our guide on church donation deductions outlines the rules before you enter your figures above.

Frequently asked questions