Income minus expenses, divided by income. Promi measures it over the trailing 12 complete months, because a bonus or an annual bill landing in one month moves a shorter window further than any change in habits, and it states no rate until 3 complete months are on file. Based on bank activity only: 401(k) deferrals and RSU vesting never appear in these numbers.
Promi labels the result in the same bands the app shows: below 10% is thin, 10 to 20% is solid, and 20% or more is strong. A rate below zero reads as negative, meaning spending ran ahead of income and the gap came from reserves or credit. The commonly cited benchmark is 20% and above, and the Bureau of Economic Analysis publishes a national version of the same calculation each month.
The reason this number gets more attention than income is that it sets two things at once. It determines how fast savings accumulate, and it determines how much those savings have to cover later, since a lower spending level is also a smaller number to replace in retirement.
Worked through
Savings Rate Benchmarks
Where this lives in Promi
Dashboard, Cash Flow and Transactions pages. The EPIM bar states the trailing-year rate from your own transactions.
Related in Transactions & Spending
See your own savings rate
Promi computes this from your linked accounts, with the definition one click from the number.
Open the live demo