What triggers an IRS audit on charitable donations?

The IRS most commonly flags charitable donation deductions when noncash contributions are large relative to income, poorly documented, or filed without the appraisal and Form 8283 paperwork the IRS requires.

The Most Common Audit Triggers

Several specific patterns draw IRS scrutiny on charitable deductions:

• Deductions that are high relative to your Adjusted Gross Income (AGI): The IRS uses automated scoring to compare your return against statistical norms for your income bracket. A charitable deduction that far exceeds what similar filers claim can push your return into review.
• A sudden spike from prior years: If your charitable deductions jump sharply compared to what you claimed in previous years, that inconsistency can attract attention.
• Missing or incomplete Form 8283: Noncash contributions over $500 require IRS Form 8283. Omitting it, or filing it with incomplete descriptions, missing signatures, or no acquisition date, is both a disallowance risk and an audit trigger.
• No qualified appraisal for donations over $5,000: For a single item or group of similar items valued above $5,000, the IRS requires a qualified appraisal, a completed Section B of Form 8283, the donee organization's signature, and the appraiser's declaration. Any of these missing elements can trigger review.
• Vague or inflated valuations: Generic descriptions such as "household goods" without itemized condition and supporting documentation, or valuations that appear aggressive for the property type, are common examination targets.
• Donations over $500,000: At this threshold, a copy of the full qualified appraisal must be attached to your return. Missing it is a frequent disallowance trigger.

The most reliable protection is a USPAP-compliant qualified appraisal prepared before you file. If you are donating property valued above $5,000, see what happens when your donation exceeds that threshold and consider requesting an appraisal before your return is due.