What is debt simplification in a bill-splitting app?

Debt simplification is an algorithm that looks at everyone's balances in a group and finds the minimum number of payments needed to settle all debts. Instead of each person paying everyone they owe individually, the app figures out who should pay whom — and how many transfers it actually takes.

How does Settlify reduce the number of payments?

Settlify calculates each person's net balance across all expenses — how much they're owed versus how much they owe — then matches creditors and debtors to cancel out as many payments as possible. A group of 6 that would normally need 15 individual transfers can often settle in 5 or fewer.

Do I still need to pay everyone I owe?

Not necessarily. After simplification, you may end up paying someone you never shared an expense with directly. That's fine — the total amounts are still correct, just routed more efficiently to minimise the number of transfers.

Does Settlify handle multi-currency debt simplification?

Yes. You choose if and when to convert currencies. Settlify shows you the simplified settlement in the currencies involved, without hidden conversions or mysterious discrepancies.

Settle Up in the Fewest Payments Possible

By the end of a group trip, the debt picture gets messy. Alex owes Marco for the Airbnb. Marco owes Priya for the rental car. Priya owes Alex for the airport taxi. Technically, three people could resolve everything with one payment — but without something doing the maths, you end up with three separate transfers instead.

If these payments are in different currencies, the situation gets even more complicated. More transactions, mean more conversion fees. The more people and currencies involved, the more complex the settlement becomes.

Settlify works it out for you.

What "simplify debts" actually means

Every time an expense is added, Settlify recalculates each person's net balance — total paid out minus total owed. It then finds the smallest number of transfers that brings every balance back to zero.

The result: instead of everyone paying everyone they directly owe, the group settles with as few payments as possible. This saves you time and in some cases money on transaction fees — especially when multiple currencies are involved.

Settlify app showing debt simplification: 5 payments reduced to 1 — A group that needed 5 payments settles with just 1. Settlify shows you exactly who pays whom.

Why it matters more than it sounds

In a group of four, you might have six different payment directions with 2 currencies involved. That number climbs fast with more people or more currencies. Even when everyone is trying to be fair, coordinating all those transfers creates friction: "Wait, do I pay you or does Marco pay you first?" "I already sent €20 — does that count?"

Simplifying the settlement removes that conversation entirely. Everyone opens the app, sees exactly who they owe and how much, and sends one payment. Done.

What the settlement screen shows you

The simplified settlement is always on by default on the Settle screen. For each person, it shows:

Who they need to pay
The exact amount in the original currencies (no hidden conversions)
Apps you and your friend have in common — no need to guess which payment app to use
Optional currency conversion note if you have multiple currencies in the group

Settlify payment options screen showing Revolut as a suggested payment app — Settlify suggests the payment apps you and your friend both already have.

One thing to keep in mind

After simplification, you may be asked to pay someone you never shared an expense with directly. That can feel odd the first time — "Why am I paying Marco? I only owe Priya."

The amounts are correct. The algorithm has simply re-routed the payments to cut the total number of transfers. Think of it like a clearing house: instead of every debt flowing back and forth, they're netted out and settled in the fewest possible moves.