Run Rate

A run rate is a forward-looking estimate of annual revenue or costs calculated by taking figures from a shorter period and projecting them across a full year. If a business generates £40,000 of revenue in a single month, its annualized run rate is £480,000 (£40,000 multiplied by 12). The same method applies to a quarter: multiply quarterly revenue by 4 to arrive at the annual equivalent. The calculation assumes that current trading conditions continue unchanged for the rest of the year.

Where Run Rate Is Useful and Where It Falls Short

Run rate gives a quick reference point for annual performance at any moment in the year, without waiting for 12 months of data to accumulate. It is particularly useful when a business has changed significantly - after hiring additional staff, launching a new service line, or winning a major new account - and prior-year figures no longer reflect current trading. Rather than waiting a full year to understand the impact, a business owner can calculate the run rate on the most recent three months of trading to estimate the annualized effect.

The limitation is seasonality. A landscaping business that earns most of its revenue between March and October will produce a misleading run rate if calculated during a peak summer month. A promotional merchandise distributor that spikes in November and December around corporate gifting will do the same. For seasonal businesses, run rate is more reliable when calculated across a full rolling 12-month period rather than the most recent single month or quarter.

Run rate is distinct from a sales forecast. A forecast accounts for expected changes - new contracts coming on stream, planned growth, anticipated customer losses. Run rate assumes nothing changes and simply extrapolates current performance forward. Both are useful; neither should be treated as a substitute for the other.