random prices average ~50p
Advanced options
Round-ups work because they're invisible: nobody misses 37p. Most banking apps do it free: some offer a 2x/5x multiplier, which turns pocket-shrapnel into a real emergency-fund drip. The catch to check: round-ups into an account paying 0% is money moved, not money working: point the round-up pot at your best easy-access rate (see our savings interest calculator) and the invisible habit compounds.
What The Round-Up Savings Calculator Works Out
- Saved per week: card transactions per week multiplied by the average round-up. Card prices land randomly against the pound boundary, so the mean round-up sits near 50p; a cashless Briton making 20 to 30 weekly transactions drips GBP 10 to GBP 15 a week into the pot.
- Saved per year: the weekly figure times 52, so GBP 500 to GBP 750 a year for a typical user. The sub-line shows five years of it before any interest: a holiday deposit or Christmas float, not a pension.
- The honest assessment: round-ups' real value is behavioural. Unnoticed deductions do not register as losses, which converts self-described non-savers into people who see themselves saving, and that is the gateway to the standing order that does the real work.
- Round-up multiplier (advanced): most app banks offer 2x, 5x or 10x round-ups. A 37p round-up becomes 74p or GBP 1.85, the legitimate escalation once the habit has proved itself. Changing this changes the basic cards too.
- Interest on the pot (advanced): round-ups parked at 0% are motion without progress. Enter your easy-access rate and the projection compounds weekly; a typical rate turns a decade of round-ups into a visibly bigger number.
- Years to project and paused weeks (advanced): how long to run the projection, and how many weeks a year the feature is switched off (holidays abroad, or months when an overdraft makes skimming 50p into savings a losing sum at 39.9% interest).
- Extra weekly top-up (advanced): a fixed amount added to the same pot each active week, for stacking a deliberate drip on top of the shrapnel.
- Pot after the projection and interest earned (advanced): the balance at the end of the chosen years, how much of it you paid in and how much is interest.
- Equivalent standing order (advanced): the monthly transfer that would move the same money on purpose. Seeing it as a round number is usually the moment people set one up.
- Year-by-year projection (advanced): paid in, interest and pot at the end of each year.