Excess Business Loss Limitation
Authority: IRC §461(l); Form 461
The excess business loss limitation under Section 461(l) caps how much net business loss a noncorporate taxpayer can deduct against non-business income like wages and investment gains in a single year. Aggregate business losses beyond the annual threshold (indexed; $313,000 single and $626,000 joint for 2025) are disallowed for the year and convert into a net operating loss carryforward, deductible in later years under NOL rules. The limitation was made permanent by the 2025 tax legislation. It is the last of four gates a loss must pass (basis, at-risk, passive, then 461(l)) and bites hardest on taxpayers using large bonus depreciation losses, such as cost-segregated real estate under REPS or the short-term rental rules, to shelter big W-2 or capital gain years: the loss still works, but only up to the cap now, with the rest deferred a year. Wages are not business income for this test.
Example
A married real estate professional generates an $900,000 rental loss via cost segregation against her spouse's $1,200,000 of wages. Only $626,000 deducts this year; the remaining $274,000 becomes an NOL usable next year.
Related terms
Net Operating Loss (NOL)
A net operating loss arises when a taxpayer's allowable deductions exceed gross income for the year, most often from...
Passive Activity Loss (PAL) Rules
The passive activity loss rules of Section 469 are the third and usually toughest gate for deducting business and...
Cost Segregation
Cost segregation is an engineering-based study that breaks a purchased or constructed building into components that...
Bonus Depreciation
Bonus depreciation under Section 168k allows a business to deduct the full cost of qualifying property in the year...
Stop looking terms up and start putting them to work.
Amadae runs your books, your quarterly estimates, and your tax strategy on autopilot, so concepts like this one turn into actual savings.
Book your free review