Paying by card: how it changes the answer

A card moves money out of checking on the day it is paid, not the day you buy. Buyancy follows that.

Published Oct 29, 2026 · Checked against the app Oct 29, 2026 · 2 min read

Putting a purchase on a credit card does not take the money out of your checking that day. It comes out when you pay the card. Buyancy follows the money, so cards can turn a Wait into a Yes, or the other way round.

When the money leaves checking

A card has a statement: a bill for what you spent in a billing period. You pay it by the due date.

If you buy something on a card, it lands on a statement, and the payment comes out of your checking when that statement is paid. The answer says it in plain words, like "you buy it on Oct 7, and the card is paid from checking on Oct 27".

Paying on the day you usually pay

Many people pay a card on a different day from its due date. If Buyancy can see that you pay a card around the same day each month, based on at least two months of payments, it uses that day instead. The answer tells you when it does: "Visa ··1234 is usually paid around the 2nd (5 days before its due date)".

Nothing is stored for this. Buyancy works it out again each time from your recent transactions.

What counts

• The balance you owe now. It is paid on the day it is due.
• Your recurring bills that are charged to a card. They leave checking when that card is paid. You can say which card a bill is on when you add it or review it on Recurring. If your bank saw a bill on a card and you have not answered, Buyancy assumes it is on that card, and says so.
• The purchase you are asking about, if you choose to pay with the card.

What does not count

Other spending you put on a card after its statement closes is not counted. Buyancy cannot predict what you will buy, so it does not guess. The answer says this every time you have a card.

Cards are also not added to your cushion. Each card's payment is already taken out on its due date, so adding the balance to the cushion as well would count the same money twice.

If you keep a card by hand

If you added a card yourself, enter its statement balance once the statement closes. That is the amount the card says to pay by the due date, and it can differ from the total you owe. Buyancy pays the statement balance on the due date, and the rest a billing cycle later.

If the due date has passed and the statement is still unpaid, Buyancy counts it as unpaid and due today. When you pay it, update the card, and the question goes away.

Credit left

When you ask about paying with a card, the answer shows how much credit would be left. Banks report a limit for some cards only. If yours is missing, choose "Set limit" on the card in your accounts.

This explains how Buyancy works. It is not financial advice, and it does not know your whole situation.