Also known as: ALS · actual loss sustained meaning · actual loss sustained business income
Actual loss sustained is a business income valuation method under which the insurer reimburses the real income you actually lose during a covered shutdown, rather than a pre-set dollar figure.
Actual loss sustained (ALS) is how many business income (business interruption) policies measure your payout: instead of a stated dollar limit chosen in advance, the insurer pays the actual net income and continuing expenses you lose during the period of restoration, subject to any time limit in the policy. The trade-off is proof - you must document your real financial loss with records like profit-and-loss statements, so good bookkeeping directly affects what you can recover. For a startup with a physical office or lab, an ALS provision can be more generous than a fixed limit, but only if you can substantiate the numbers.
Actual loss sustained (ALS) means your insurer pays the real business income you actually lose during a covered interruption - your lost net profit plus continuing expenses like rent and payroll - instead of a fixed dollar amount agreed to in advance. You prove the loss with financial records, and the payout is usually limited by a time period, such as 12 months, rather than a hard dollar cap. It is a common valuation basis in business income and business interruption coverage.
With a stated or scheduled limit, you pick a dollar amount up front and that is the most the policy will pay, regardless of your true loss. With actual loss sustained, there is no pre-set dollar figure - the insurer pays whatever you can prove you actually lost, up to the policy's time limit. ALS reduces the risk of under-insuring, but it puts the burden on you to document the loss.
You need records that show what your business would have earned had no interruption occurred and what it actually earned during the shutdown. That typically means profit-and-loss statements, tax returns, sales history, and evidence of continuing expenses like payroll and rent. Because the payout is based on documented loss, weak bookkeeping can directly reduce what you collect.
Definitions are educational and may be modified by your specific policy language, endorsements, and state rules. For regulatory guidance, refer to the California Department of Insurance or the NAIC.
Last updated: July 2026.