DuoCents
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Add an interest rule

Let DuoCents add interest to an account on a schedule, using a formula.

Updated 2026-10-07

An interest rule adds interest to an account at regular intervals. You describe the interest with a formula, and DuoCents shows the yearly rate it works out to.

Where to find it

Open the app menu and choose Interest rates.

Steps

  1. The top of the screen summarises your rules with Daily accrual, Monthly estimate and Earned YTD.
  2. Tap the round + button (its label is Create rule).

The Interest rates summary and the Create rule button marked

  1. Type a Name for the rule.

The name field marked on the new rule form

  1. Tap Account and pick the account that earns the interest.

The account picker with Everyday Checking marked

  1. Type the Formula and the Interval (days). In the formula, {balance} stands for the account's balance. The APR card shows the yearly rate.

The formula and interval fields and the APR card marked

  1. Tap Create.

The Create button marked at the bottom of the form

Tips

  • For example, {balance} * 0.0005 every 30 days adds 0.05% of the balance each time, which is about 0.6% a year.
  • Each time a rule runs, DuoCents records the interest as income on that account.
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