Charitable Deduction Optimizer Calculator

Years to Bunch directly multiplies how much charitable giving lands in the single bunching year (bunchedDonation = annualDonation x bunchYears, capped at the 60% AGI limit). A bigger bunched-year deduction means a bigger excess over the standard deduction, which is what actually gets deducted beyond the baseline you'd claim anyway -- so Total Savings (Bunched) and Bunch Year Tax Savings both scale up with the number of years pooled together.

No -- the effect depends on Filing Status. Bunching Benefit is the gap between what bunching saves and what giving the same total annually would save. At the default single filing status, a higher Other Itemized Deductions baseline narrows that gap, since the annual (non-bunched) strategy is already closer to itemizing on its own every year. For married filing jointly's much larger standard deduction, the same increase in Other Itemized Deductions can widen the gap instead, so check your own numbers rather than assuming one direction.

Cash charitable deductions are capped at 60% of AGI under IRC § 170(b)(1)(G)(i) in a single year. Any bunched donation amount above that limit shows up as AGI Excess Carryforward rather than being lost -- in reality the IRS lets you carry forward unused charitable deductions for up to five years, though this calculator doesn't model the tax benefit of that later carryforward, only the amount available to carry.

Cash gifts are capped at 60% of AGI in this model, but donating appreciated securities directly to a Donor-Advised Fund is typically capped at a lower 30% of AGI under IRS rules, even though doing so can avoid capital-gains tax on the appreciation entirely. This calculator only models the cash-gift path and its 60% ceiling, so if your bunching strategy leans on donating stock instead of cash, the real deduction limits and tax math differ from what's shown here.