Bargain Sale to Charity: Tax Mechanics and When It Makes Sense

Not tax or legal advice. Bargain sale treatment involves gain recognition, appraisal requirements, and AGI limit interactions that vary by situation. Model these with a fee-only charitable planning advisor before signing.

A bargain sale to charity is a transfer of property at a price below fair market value — part charitable gift, part sale. If you sell a property worth $1,000,000 to your alma university for $400,000, you've simultaneously made a $600,000 charitable gift and a $400,000 sale. Both the sale gain and the deduction are governed by a specific IRS formula that produces results most donors don't expect: you recognize a taxable gain even when the sale price is well below your original cost basis.

The legal framework: IRC §1011(b) and Reg. §1.1011-2

IRC §1011(b) creates a special basis-allocation rule whenever a charitable contribution deduction is allowable by reason of a sale. Instead of applying your full cost basis against the sale price, you apply only the proportionate share of your basis that corresponds to the fraction of FMV you received in cash.¹

The formula under Treas. Reg. §1.1011-2:

• Allocated basis = Total adjusted basis × (Amount realized ÷ FMV)
• Recognized gain = Amount realized − Allocated basis
• Charitable deduction = FMV − Amount realized

The deduction is subject to the normal AGI percentage limits (30% of AGI for appreciated capital gain property donated to a public charity — the same limit that applies to a full gift).

Worked example: appreciated land

A donor owns a parcel of undeveloped land with these characteristics:

• Fair market value: $1,000,000
• Adjusted basis: $200,000
• No mortgage
• Held long-term (over one year)
• Donor's income: $900,000/yr; marginal rate 37%

The donor wants to support a land conservation organization and also needs some liquidity. They sell the land to the conservancy for $400,000.

The donor receives $400,000 at closing, pays $76,160 in capital gains tax, and recovers $210,000 in income tax savings from the charitable deduction — for a net after-tax position of $533,840 while giving $600,000 of value to the charity.

How a bargain sale compares to the alternatives

Using the same $1M property / $200K basis / 37% bracket (35% OBBBA cap) / 23.8% LTCG+NIIT rate:

*Sell-and-donate: proceeds of $1M − $190,400 tax − $600K donated + $210K deduction savings = $419,600. Assumes 60% AGI cash limit not binding.

The comparison reveals two important points. First, a bargain sale is substantially better than selling first and donating cash ($533K vs $420K after-tax) because the capital gain on the donated portion is permanently avoided — the IRS never taxes the $480K of embedded gain that "goes" to the charity. Second, a full donation produces the highest total charitable impact ($1M to charity vs $600K) and a meaningful deduction ($350K tax savings), but with no cash to the donor. The bargain sale sits in the middle: less charitable impact than a full gift, but more after-tax cash than the sell-and-donate path.

The mortgage trap: automatic bargain sale treatment

If the property carries an outstanding mortgage and you donate it to charity, the charity assumes or takes subject to that debt. Under the Crane doctrine and Reg. §1.1011-2, the outstanding debt counts as "amount realized" — even when you receive zero cash. This triggers automatic bargain sale treatment on what donors often assume is a pure charitable gift.

Example: $1M property, $200K basis, $300K mortgage, donated outright (no cash paid by charity).

The donor writes no check, receives no cash, and yet owes $57,120 in capital gains tax at closing — because the debt assumption is treated as a $300,000 payment. This catches many donors completely off guard. The standard practice for donating mortgaged real estate: pay off the mortgage before execution, or choose a Flip CRUT where the trust holds the property and manages the sale internally.

Real estate: depreciation recapture complication

Rental and commercial real estate has a further wrinkle: accumulated depreciation creates "unrecaptured Section 1250 gain," which is taxed at 25% rather than the 20% LTCG rate.² In a bargain sale, the gain allocated to the "sale portion" is split between the §1250 recapture element (25% rate) and the true long-term capital gain element (20% + NIIT).

Example: Commercial building, FMV $2M, adjusted basis $400K (after $600K accumulated depreciation on original $1M cost), sold to a charity for $800K.

• Allocated basis: $400K × ($800K ÷ $2M) = $160K
• Total gain on sale: $800K − $160K = $640K
• Unrecaptured §1250 gain (proportional share): $600K depreciation × ($800K / $2M) = $240K, taxed at 25% = $60,000
• Remaining LTCG: $640K − $240K = $400K, taxed at 23.8% = $95,200
• Total gain tax: $155,200 (vs $152,320 on raw land with similar numbers)

The distinction matters when modeling the actual cash cost of the bargain sale on depreciated real estate. A specialist should run these numbers before the donor commits.

2026 OBBBA adjustments to the charitable deduction

The charitable contribution portion of a bargain sale is subject to the same OBBBA adjustments that apply to other charitable gifts:³

• 0.5% AGI floor (all itemizers): Your total charitable contributions for the year must exceed 0.5% of AGI before any deduction is allowed. On a $600K AGI, the floor is $3,000. For bargain sale donors at HNW income levels, this floor is negligible — any substantial bargain sale gift clears it immediately.
• 35% value cap (37% bracket only): If your marginal rate is 37%, the effective benefit of each dollar of charitable deduction is capped at 35 cents. The deduction amount itself is unchanged — only the tax-rate benefit is capped. In the primary example, the $600K deduction still produces $210,000 in tax savings (35% × $600K), not $222,000 (37% × $600K).

The 30% of AGI annual limit (for appreciated property to a public charity) and 5-year carryforward still apply normally. A $600K deduction in a $500K AGI year uses $150K immediately and carries $450K forward over five years.

When a bargain sale makes sense

A bargain sale fits a specific set of circumstances. The more of these that apply, the stronger the case:

1. You want to give an illiquid appreciated asset to charity but need some cash back. Real estate and closely-held business interests don't split easily. A bargain sale solves the liquidity problem without requiring a separate sale to third parties.
2. You've confirmed the charity will accept a partial payment on the property. Charities can decline bargain sales. Universities and community foundations often have gift acceptance policies that handle them; smaller nonprofits may not have the legal or financial infrastructure to receive property even at a discount.
3. You can tolerate the gain tax out-of-pocket at closing. Unlike a CRT or Flip CRUT, a bargain sale generates an immediate taxable gain. You need liquidity to pay the capital gains tax — typically in the year of the sale — before you receive the deduction benefit on your return.
4. You've compared the gain tax to the sell-and-donate alternative. As shown above, the bargain sale typically wins versus selling first and donating proceeds, because the gain on the donated portion is permanently avoided. But model the exact numbers — the gap varies with income level, AGI limit availability, and carryforward years.
5. The property carries no mortgage (or you're planning to retire it first). Mortgaged property creates a taxable gain equal to (debt ÷ FMV) × embedded appreciation — with no cash to the donor to pay it. Pay off the debt first or choose a different vehicle.

Bargain sale vs. Flip CRUT for appreciated real estate

For real estate specifically, the Flip CRUT is often the closest alternative to a bargain sale. The comparison:

Documentation requirements

A bargain sale triggers the full set of IRS substantiation requirements for property gifts:

• Qualified appraisal: For property (other than publicly-traded securities) with a claimed deduction over $5,000, you need a qualified appraisal from a qualified appraiser meeting the standards of Reg. §1.170A-17. The appraisal must be conducted no earlier than 60 days before the date of contribution and no later than the due date of your return for the year of contribution (including extensions).⁴
• Form 8283, Section B: Report noncash charitable contributions over $500 (Section A for $500–$5,000; Section B for over $5,000). For gifts over $500,000, attach the complete appraisal to your return (check Box 14 in Part II of Section B).
• Written acknowledgment from the charity: Required for any contribution of $250 or more (IRC §170(f)(8)). Must state the amount of cash paid (zero for the donated portion), describe any property transferred, and confirm no goods or services were received in exchange.
• Report the gain separately: The recognized gain on the "sale" portion is reported on Schedule D (long-term capital gain) or Form 4797 if the property is business property. The charitable deduction goes on Schedule A. These are separate tax events on the same return.

Common mistakes

• Assuming your full basis offsets the sale price. The pro-rata basis allocation is the most common calculation error. Donors who believe they can sell for an amount equal to their cost basis and pay no gain — while still claiming a deduction — are wrong. Some gain will be recognized whenever you receive more than your allocated (not full) basis.
• Donating a mortgaged property as an "outright gift." The mortgage converts the gift to a bargain sale. A tax advisor should review any property with debt before transfer.
• Not modeling whether the charity will actually accept. Charities are not required to accept partial payments. Some have policies against it; some lack the expertise to process property gifts. Confirm in advance — preferably in writing — before incurring appraisal costs.
• Skipping the qualified appraisal. For real estate or other non-publicly-traded property, the deduction is disallowed entirely if the appraisal requirements are not met — not just reduced. Courts have upheld this strictly. Order the appraisal before the gift closes.
• Miscalculating the §1250 recapture on depreciated real estate. Real estate with accumulated depreciation has a higher-taxed gain component. The capital gains tax estimate based on the 20% rate alone understates actual tax.
• Not tracking the carryforward. If the deduction exceeds 30% of AGI, the excess carries forward for five years. Donors who don't document and track this annual carryforward can lose unused deductions when the window expires.