Pay the statement, not a guess.

Straight from the statement

Add a card's statement and attach the PDF: Money reads the statement balance, the minimum payment and the due date from it. No PDF? Type the three numbers in. Either way, the card's payment shows up on Home with what's owed and when.

Pick what to pay

The statement balance (the default, so you don't pay interest), the minimum, or your own amount. Choose the account it comes from once and Money remembers it for that card. The payment becomes a pending transfer, so it's in the forecast for both accounts: Checking goes down on the due date and the card goes to what's left.

Autopay, modeled

If the card pays itself, set it up the same way your bank does: the minimum, the statement balance or the current balance, every month, from the right account. The forecast takes each month's amount from that month's statement.

Credit limits

Add a card's limit and Accounts shows the credit you have left beside what's owed.

When it all comes together

The card statement's due date, the rent and payday often land within a few days of each other. That's exactly what theforecast is for: it shows Checking's lowest point with the card payment in it, and suggests a transfer if the three don't fit.