The IRS treats settlement payments differently depending on what the money is compensating you for. The general rule: money that compensates you for a physical injury or physical sickness is not taxable. Money that compensates you for economic harm, lost wages, or emotional distress generally is taxable.
Non-taxable settlements. If you receive a class action payment because a product physically injured you — a defective medical device, a contaminated food product, a dangerous drug — that payment is usually excluded from your gross income under Section 104 of the tax code. You don't owe federal income tax on it and typically don't need to report it.
Taxable settlements. Payments for economic harm are a different story. If a bank overcharged you on fees, a data breach exposed your personal information, or a company misled you about a product's price — those settlements compensate for financial loss, not physical injury. The IRS considers these taxable income. You should receive a Form 1099-MISC from the claims administrator if your payment exceeds $600, and you're responsible for reporting it on your tax return.
The gray area: data breach settlements. Data breach settlements often compensate for "emotional distress" or "risk of identity theft." Courts have gone both ways on whether these are taxable. The safest approach: treat them as taxable unless your tax advisor tells you otherwise. The amounts are usually small enough that the tax impact is minimal.
What to do. Keep records of any settlement payments you receive. If you get a 1099, report the income. If the settlement clearly compensates for a physical injury, consult a tax professional before excluding it. When in doubt, report it — the downside of underreporting is far worse than paying a small amount of tax on a modest settlement check.