What are the rules for deducting charitable contributions?

Cash donations to qualified 501(c)(3) organizations are deductible up to 60% of your AGI when you itemize. Donations of appreciated stock are deductible at fair market value up to 30% of AGI, and you avoid capital gains tax on the appreciation. Non-cash donations over $500 require Form 8283; donations over $5,000 require a qualified appraisal. Always get a written acknowledgment for any single donation of $250 or more.