integer-money

Storing money as integer cents prevents floating point rounding errors by keeping all monetary values in exact whole-number units like amount_cents. You perform arithmetic operations directly on these integers and convert to decimal format only at the UI boundary for display.

The best way to handle currency calculations in backend handlers is keeping all business logic in integer cents. You compute totals, taxes, and invoice amounts using whole numbers to guarantee precision, deferring any division or decimal conversion until the final user-facing display layer.

Yes, Drizzle ORM supports defining money fields as integer cents. You can apply this approach by creating schema definitions using integer column types with *_cents naming conventions to enforce consistent money handling across your financial modules.

You should use integer cents instead of decimals for invoice and order totals to ensure exact arithmetic across financial calculations. Decimal types can introduce subtle floating point errors during complex tax and report computations, whereas integers guarantee precise totals.

To maintain data integrity for monetary values, name database columns using the *_cents suffix, such as amount_cents, tax_cents, and total_cents. This naming convention enforces consistent money handling and clearly signals to developers that values are integers.

You should convert integer cents back to dollars only at the UI boundary for user display. Keep all internal business logic, schema storage, and arithmetic operations in integer cents, transforming the exact values to decimal format exclusively for the final presentation layer.