How to Run a Charity Auction: Silent, Live and Online, With the Tax Rules

A charity auction, silent or live, raises money twice: once from the people who donate items and again from the people who bid on them. It also carries more tax rules than almost any other fundraiser, and none of the top guides to running one mention them. This guide covers how to run a silent or live auction, a 12-week timeline, the online platforms and what they charge, and the IRS and sales tax rules, with a free Word download of a bid sheet, an item donation form and a winner’s statement.

Silent, live or online

• Silent auction. Items on tables with bid sheets; guests write bids over an evening. Works for many mid-value items and needs little staging.
• Live auction. An auctioneer sells a few high-value items from the stage. Raises the most per item but needs an audience that can afford them and a good auctioneer.
• Online or mobile bidding. Guests bid on their phones, before or during the event. Extends the audience beyond the room and handles checkout, at a fee.

Most charities combine them: a silent auction for most items, a short live auction for the best five or ten, and mobile bidding so people who cannot attend can take part. Where auctions sit among other options is in fundraising ideas, which also shows that the median charity running events spent $24,672 on direct costs.

How to run a silent auction, step by step

1. Set a goal and a budget. Decide what the auction must net after costs, and how many items that needs.
2. Recruit a chair and a small committee. Item collection is the biggest job; split it by category. See how to recruit volunteers.
3. Collect items. Experiences, local services and things money cannot easily buy sell best. Ask local businesses; see companies that donate. Get each one confirmed on an item donation form.
4. Value every item. You need a good-faith estimate of fair market value for the winner’s statement. Use the retail price or the donor’s estimate, and keep the evidence.
5. Set opening bids and increments. A common approach is an opening bid around 30% to 50% of value, with increments of about 10%. Too high and nobody starts; too low and items sell cheaply.
6. Write descriptions with what is included, any restrictions and expiry dates, and the estimated value.
7. Display items in groups by theme or value, and close tables in stages so people move around the room.
8. Take payment before items leave, and give each winner a written statement of value.
9. Thank everyone, item donors as much as bidders, within a week. See donation thank-you letters.

A 12-week timeline

The tax rules, for everyone involved

Two of these trip charities up most often. First, a winning bid is a gift only to the extent it exceeds the item’s value. A guest who pays $600 for a week in a beach house worth $600 has made no deductible contribution, which is the IRS’s own example in Publication 526. So the winner’s statement must show the estimated value, and if the payment is over $75 the law requires it. Second, items you sell were put to an unrelated use, because you did not use them in your mission. For appreciated goods such as artwork, the item donor’s deduction is then limited to what they paid, not what it is worth. Tell major item donors this before they give, rather than after.

Services are not deductible at all. A lawyer who donates five hours of advice, or a family who lends their holiday home for a week, cannot deduct the value, though the gift may still be well worth having. Receipts for each kind of gift are in the donation receipt template.

Large items and Form 8282

If a donor claims more than $5,000 for an item, they file Form 8283 Section B with a qualified appraisal, and you may be asked to sign Part V, which must be signed by an official authorized to sign your tax returns. If you then sell the item within three years, as you would at an auction, you must file Form 8282 within 125 days of the sale, unless the donor identified it as worth $500 or less. The general penalty for not filing is $50.

Form 990 shows how unusual this is. In our analysis of the IRS extract, 30,013 501(c)(3)s that file the full return, 11.1%, reported more than $25,000 of noncash gifts in the year, which the instructions give “use in a charity auction” as an example of. Only 407 said they filed any Form 8282, between them 4,899 forms. Most donated auction items are worth far less than $5,000, so the form is rare; but when you do receive a high-value item, the obligation is yours, not the donor’s.

Reporting the auction on Form 990

The Form 990 instructions treat an auction as a fundraising event and split each winning bid in two. Using their example: an item worth $5,000, with that value shown to bidders, sells for $7,500. The $2,500 above value is a contribution on line 1c. The $5,000 is event income on line 8a, and the item’s value plus the auction’s other costs go in direct expenses on line 8b. The donated item itself is also reported as a noncash contribution. If contributions and income from fundraising events together exceed $15,000, you complete Schedule G Part II, listing events with gross receipts over $5,000. Raffles held at the same event are gaming, reported separately on line 9; see can a nonprofit hold a raffle. More on the return is in Form 990.

Unrelated business income

Auction income is usually not unrelated business income. The tax code excludes activities where substantially all the work is done by volunteers, and sales of merchandise substantially all of which was donated, under section 513(a). A volunteer-run auction of donated items meets both. An auction run by paid staff selling items you bought for resale is a different question; see can a nonprofit sell products.

Sales tax on auction items

Sales tax depends on the state, and many charities are surprised that auction sales can be taxable. Three examples, from each state’s own guidance:

• California. Nonprofits selling non-food items at auctions are retailers, and for auctions and silent auctions the full amount received is taxable regardless of the item’s value, according to CDTFA Publication 18 (January 2026).
• Texas. Nonprofits collect tax on taxable items they sell, but may hold two one-day tax-free sales or auctions a year, each lasting up to 48 hours, with limits on items priced over $5,000, according to the Comptroller’s nonprofit guide.
• New York. Two or fewer traditional auctions a year are not taxable, but a third, or any auction held through a commercial auction house, is, according to Publication 843, a 2009 publication worth confirming with the department.

Check your own state’s revenue department before the event, and register to collect if you need to.

Online auction platforms and what they charge

Read on each vendor’s own pricing page on 16 October 2026. “Free” usually means free to set up, with a fee per winning bid or per payment; compare the total cost of a realistic auction, not the headline. The donation fee calculator shows how processing fees add up, and broader event software is compared in fundraising software. Text-based bidding and donations at the event are covered in text fundraising.

Item ideas that sell

• Experiences: a private tour, dinner cooked by a local chef, a day with a professional.
• Things money cannot buy: naming a programme space, a walk-on part, front-row seats.
• Local services: photography, a home clean, a fitness package, legal or financial advice.
• Packages that combine small items into one worth bidding on.
• Travel, when donated rather than bought, and with dates and restrictions stated.

Avoid items you had to buy unless a sponsor covers them, and alcohol or anything else your state licenses unless you have checked the rules. A sponsor can underwrite the costs in return for acknowledgment; see corporate sponsorship.

After the auction

Record what each item raised against its value, which items did not sell, and how many bidders were new to you. Then follow up with new bidders as donors, not just as buyers: an auction is often someone’s first contact with your organization. Measure how many give again the next year; see donor retention and fundraising metrics.

Where the figures come from

The noncash gift and Form 8282 figures are our analysis of the IRS Statistics of Income extract of Form 990 returns, Part IV line 29 and Part V lines 7c and 7d, for 269,686 501(c)(3)s that file the full return. Script: bin/analyse_soi_quidproquo.py. The tax rules were read in Publications 526 and 1771, Form 8282, the Form 8283, Form 990 and Schedule G instructions and sections 170 and 513 of the Internal Revenue Code; sales tax in each state’s own guidance; and platform pricing on each vendor’s site, all on 16 October 2026. This guide is general information, not legal or tax advice.

This is reference information, not legal or tax advice. Rules vary by state and change over time. For a decision that carries real consequences, check the current text at irs.gov or your state registry, and talk to a nonprofit attorney or CPA.