Cost of forgetting calculator

Updated 29 October 2026.

The cost of forgetting is the money you lose only because something wasn't done on time: a late fee, a subscription you meant to cancel, a no-show charge, a refund window that closed. Enter how often each happens in a year and what it costs, and the calculator adds it up.

Finding your real numbers

Your bank and card statements are the honest source. Search the last twelve months for:

• Late fees and interest on cards, loans and utility bills.
• Renewals and free trials that turned into charges you didn't want.
• No-show or late-cancellation fees from doctors, salons, gyms or restaurants.
• Returns you didn't make in time, or refunds you never claimed.
• Fines and penalties for expired documents or late filings.

Most people find a few small charges they had forgotten about, which is the point.

Why small costs add up

Each one is small enough to shrug off. A late fee here, an unwanted renewal there. But they're rarely one-offs: the bill that's late once is often late again, and every subscription with a free trial is another chance to be charged.

Cutting the number

Almost every item on the list is solved by a reminder a few days before the date. That's what Mindie does: text it "remind me on the 12th that the free trial ends on the 15th" or send a screenshot of a bill, and it messages you on WhatsApp in time. It's free for 7 days, then $90 a year on the yearly plan. If the calculator shows less than that, you may not need a reminder app for money alone, and that's fine to know.

Questions

This tool runs in your browser: nothing you type is sent to Mindie or saved. Checked on 29 October 2026.