What Are the 'At-Risk' Rules for Deducting Business Losses?
On paper, a struggling business can generate a loss far larger than the cash its owner ever put into it — inventory financed with a loan, equipment bought on credit, expenses that outpaced revenue by a wide margin. The at-risk rules exist to make sure the tax deduction for that loss doesn’t outrun what the owner actually stands to lose.
The short answer
The at-risk rules limit how much of a business loss someone can deduct in a given year to the amount they actually have at economic risk in the activity — generally cash invested, the value of property contributed, and certain debt for which they’re personally liable. Losses beyond that at-risk amount aren’t deductible yet; they carry forward until the owner has more at risk in a later year.
What counts as ‘at risk’
Amounts at risk generally include cash directly contributed to the business, the adjusted basis of property put into it, and borrowed money the owner is personally liable to repay — for instance, a loan they signed for individually, where a lender could pursue their personal assets in default. Debt for which the owner has no personal liability, such as many forms of nonrecourse financing secured only by the business’s own property, typically doesn’t count toward the at-risk amount, even though it may still show up as a business expense. The distinction matters because a business that looks heavily financed on paper may leave its owner with a much smaller at-risk balance than the total investment suggests.
Why the limit exists
Without this limit, a business loss financed almost entirely by debt the owner isn’t truly on the hook for could generate a tax deduction disconnected from any real economic downside. The at-risk rules tie the size of a deductible loss to genuine financial exposure, so the tax benefit roughly tracks the actual risk being taken, rather than letting paper losses run ahead of real money on the line.
At-risk vs. passive activity: two different filters
It’s easy to conflate the at-risk rules with the passive activity loss rules that apply to new business losses, but they’re separate checkpoints that a loss has to clear in sequence. The at-risk limit asks how much money is genuinely on the line; the passive activity rules ask how involved the owner is in actively running the business. A loss can clear the at-risk test — meaning there’s plenty of real money invested — and still be limited by the passive activity rules if the owner doesn’t materially participate in operations. Both limits can apply to the same loss, and each is calculated separately before the loss is allowed to offset other income.
How a suspended loss gets freed up
A loss disallowed under the at-risk rules in one year isn’t gone; it’s suspended and carried forward to future years. It becomes usable once the owner’s at-risk amount increases — by contributing more cash, taking on debt they’re personally liable for, or through the business generating enough income to restore basis. Selling or fully disposing of the business interest can also trigger recognition of previously suspended losses in some circumstances, though the specifics depend on how the disposition happens. In cases where a suspended loss combines with other deductions to exceed income entirely in the year it’s finally allowed, it may factor into a net operating loss calculation.
The bottom line
The at-risk rules are ultimately an accounting for reality: a deduction generally can’t exceed what someone actually stands to lose. For anyone tracking losses from a Schedule C business or one held through a pass-through entity, keeping a running tally of at-risk basis, separate from the business’s own books, is often the only way to know in advance whether a loss will be usable this year or has to wait.