How to Calculate a Charitable Remainder Trust Payout Rate

The IRS Sets Hard Boundaries on CRT Payout Rates

A Charitable Remainder Trust payout rate must satisfy two simultaneous IRS tests under IRC Section 664. First, the annuity or unitrust payout rate must fall between 5% and 50% of the trust's initial fair market value. Second, the present value of the remainder interest passing to the charity must equal at least 10% of the initial contribution, calculated using the IRS Section 7520 rate for the funding month.

A donor cannot simply pick a number. The two tests interact. A higher payout rate reduces the present value of the charitable remainder. Push the rate high enough and the 10% remainder test fails. At that point, the trust does not qualify as a Charitable Remainder Trust under federal law, and the donor receives no charitable income tax deduction.

The Section 7520 rate changes monthly. The IRS publishes it as 120% of the applicable federal mid-term rate. When the 7520 rate is low, fewer payout rate options pass the 10% remainder test. When the 7520 rate is high, more options pass. Funding a CRT in the right month can meaningfully expand the viable payout range.

The Core Payout Rate Formula for a Charitable Remainder Annuity Trust

For a Charitable Remainder Annuity Trust (CRAT), the annual payout is a fixed dollar amount calculated as a percentage of the initial contribution. The formula is straightforward.

Annual CRAT Payment = Initial FMV x Payout Rate

The charitable deduction equals the Initial FMV minus the present value of all projected annuity payments, discounted at the Section 7520 rate. IRS Publication 1457 contains the actuarial tables used to calculate that present value.

Worked Example: $1,000,000 CRAT, Age 65 Donor, 5.2% Payout Rate

A donor, age 65, funds a CRAT with $1,000,000 in appreciated stock. The Section 7520 rate for the funding month is 5.0%. The donor selects a 5.2% payout rate.

• Annual payment: $1,000,000 x 0.052 = $52,000
• Present value of annuity stream (from IRS Table S, single life, age 65, 5.0% discount rate): approximately $670,000
• Present value of charitable remainder: $1,000,000 - $670,000 = $330,000
• Remainder as % of initial FMV: 33.0%

The 33.0% remainder clears the 10% minimum test. The donor claims a $330,000 charitable deduction in the year of funding. At a 37% federal marginal rate, that deduction produces roughly $122,100 in federal tax savings, subject to AGI limitations under IRC Section 170(b).

The Core Payout Rate Formula for a Charitable Remainder Unitrust

A Charitable Remainder Unitrust (CRUT) pays a fixed percentage of the trust's fair market value, revalued annually. The payment rises or falls with investment performance. The payout rate is applied each year to the current FMV, not the original contribution.

Annual CRUT Payment = Current Year FMV x Payout Rate

The charitable deduction is calculated differently than a CRAT. Because the payment fluctuates, the IRS uses a different actuarial approach, still referencing Publication 5009 and IRS Table U(1) for single-life CRUTs.

Worked Example: $2,000,000 CRUT, Age 72 Donor, 6.0% Payout Rate

A donor, age 72, funds a CRUT with $2,000,000. The Section 7520 rate is 5.4%. The donor selects a 6.0% unitrust payout rate.

• Year 1 payment: $2,000,000 x 0.060 = $120,000
• If the trust grows to $2,100,000 by year 2: Year 2 payment = $2,100,000 x 0.060 = $126,000
• Present value of charitable remainder (IRS Table U(1), age 72, 5.4% rate): approximately $780,000
• Remainder as % of initial FMV: $780,000 / $2,000,000 = 39.0%

The 39.0% remainder passes the 10% test. The donor claims a $780,000 charitable deduction. At 37%, that deduction is worth up to $288,600 in federal tax savings. The donor also defers capital gains tax on the appreciated assets transferred into the CRUT.

How a High Payout Rate Destroys the Charitable Deduction

Setting the payout rate too high eliminates the CRT's tax benefit entirely. The math is unforgiving.

A 65-year-old donor funds a $1,000,000 CRAT with a 9.0% payout rate when the Section 7520 rate is 5.0%.

• Annual payment: $90,000
• Present value of annuity stream: approximately $935,000
• Present value of charitable remainder: $1,000,000 - $935,000 = $65,000
• Remainder as % of initial FMV: 6.5%

At 6.5%, the trust fails the 10% remainder test. The IRS will not recognize it as a qualified Charitable Remainder Annuity Trust under IRC Section 664(d)(1). The donor receives zero charitable deduction. If the donor is in the 37% bracket and had expected a $65,000 deduction, the cost of that miscalculation is roughly $24,050 in lost tax savings, plus potential penalties for improper trust administration.

How to Find the Maximum Viable Payout Rate

Work backward from the 10% remainder requirement. The maximum payout rate is the highest rate at which the present value of the remainder equals exactly 10% of the initial FMV.

Use IRS actuarial tables from Publication 1457 (CRAT) or Publication 5009 (CRUT). Plug in the donor's age, the Section 7520 rate, and the trust term. Test different payout rates until the remainder present value equals 10.0% of funding amount. That result is your ceiling.

For most donors under age 70 with a Section 7520 rate below 5.5%, the practical ceiling on a single-life CRAT sits between 6.5% and 8.5%. For older donors, the ceiling rises because the trust term is shorter and the annuity stream is discounted over fewer years.

Choosing a Payout Rate Below the Maximum

Picking the highest possible rate is rarely the right strategy. A higher payout rate means a smaller charitable deduction and a faster depletion of trust assets, which reduces payments in later years for CRUTs.

Most estate planning attorneys recommend setting the CRUT payout rate between 5.0% and 6.5%. That range balances a meaningful charitable deduction against a sustainable income stream. A 5.0% rate on a $2,000,000 CRUT funded at age 65 with a 5.4% Section 7520 rate produces a remainder value of approximately $1,100,000, a $1,100,000 charitable deduction, and a year-1 income payment of $100,000.

Compare that to a 6.5% rate on the same trust. The year-1 payment rises to $130,000, but the charitable deduction falls to roughly $700,000. The donor earns $30,000 more in year 1 but sacrifices approximately $148,000 in federal tax savings at the 37% bracket. Unless the donor needs the additional cash flow immediately, the lower rate produces better after-tax results.

Model Your CRT Payout Rate Before You Fund the Trust

Every CRT calculation depends on three variables that are specific to the funding moment: the Section 7520 rate, the donor's age, and the initial FMV. None of these stay constant. Funding a week later, a month later, or after the donor's birthday changes the math.

Run the calculation before transferring assets. Use the CalcMoney Income Tax Calculator to model the federal tax impact of the charitable deduction across different payout rate scenarios. Compare the deduction value at 5.0%, 5.5%, 6.0%, and 6.5% for your specific age and funding month. The difference in outcomes is not marginal. On a $1,000,000 trust at the 37% bracket, the spread in tax savings between a 5.0% and a 6.5% payout rate can exceed $148,000.

A qualified estate planning attorney should draft the CRT documents and confirm that the selected payout rate passes both IRS tests before the trust is funded. CalcMoney provides the analytical foundation. The attorney provides the legal execution.

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Results are estimates for informational purposes only. Consult a licensed financial professional before making financial decisions.