What is an Excess business loss limitation?

An excess business loss limitation is a permanent federal tax restriction that caps annual business loss deductions for noncorporate taxpayers at $305,000 for single filers and $610,000 for married couples filing jointly. Under the One Big Beautiful Bill Act, losses exceeding these thresholds become net operating loss carryforwards for future tax years. This limitation applies to S Corporations, Partnerships, and sole proprietors, preventing unlimited offsetting of nonbusiness income sources. Business owners facing these restrictions can optimize their tax strategy through Traditional 401k contributions to maximize tax-advantaged retirement savings.

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