Multi-currency budgeting is more than changing a symbol.

The right model: native amounts plus one planning view

A cross-border household usually needs two truths at once:

• The account truth: the German current account contains euros, the Hungarian card settles in forints, and the savings account may hold dollars.
• The planning truth: the household still needs one understandable answer to “how much is available for rent, groceries, or travel?”

The cleanest model stores each account and transaction in its original currency, then values the combined budget in a chosen base currency. The conversion should be explainable and revisable without rewriting the original bank amount.

If a product converts everything permanently during import, later reconciliation becomes harder. If it never converts anything, the household cannot compare priorities across currencies. Good software keeps the original and the valuation separate.

Seven questions to ask before choosing

1. Account currency

Can each account retain its own ISO currency, or does the app only change the display symbol?

2. Original transaction

Does a purchase keep the amount that the bank actually posted, even when the budget is viewed in another currency?

3. Exchange-rate date

Does the app use the transaction date, settlement date, today's rate, or a manually entered rate—and does it say which?

4. Cross-currency transfer

Can you record the amount sent and the different amount received without creating fictional income or spending?

5. Category availability

Can one category receive funds or targets in another currency, and how does its available amount change when rates move?

6. Reports

Can reports show both native amounts and a consistent converted total without double counting?

7. Missing rates

Does the app clearly mark a value as unavailable, or silently treat an unknown conversion as zero or one-to-one?

Treat transfers and foreign card purchases differently

A transfer from a €1,000 account to a forint account is not income. The sending account may lose €1,000 while the receiving account gets a specific HUF amount after the provider's spread and fee. Record both settled amounts; the difference belongs to the conversion, not to a spending category.

A card purchase is different. A €20 restaurant charge on a HUF card has a merchant amount and a card-settlement amount. The account must reconcile to the HUF amount that posted. Keeping the €20 merchant amount can still be useful context, but it should not replace the amount the account actually lost.

Bank sync is part of currency support

Ask whether the bank feed provides the transaction currency, the account currency, and both amounts for a converted card purchase. Coverage can differ by institution and account type even within the same country.

If automatic sync loses important currency detail, a good file import can be the better workflow. Test one current account, one foreign-currency account, one converted card purchase, and one transfer before moving the household's history.

Four credible approaches on Apple devices

Pigget

For a native, envelope-first household plan.Accounts and goals keep natural currencies while one base currency explains the combined budget. iPhone and iPad only; currently in private beta.

Banktivity

For deep Apple-native financial management.Different account currencies, downloaded rates, cross-currency transfers, and converted reports on Mac, iPhone, and iPad. Multi-currency is on the Gold tier.

PocketSmith

For global aggregation and forecasting.Live conversions, bank feeds in 49 countries, and long-range projections in a web product with a mobile companion.

YNAB

For separate plans with a mature method.YNAB explicitly requires separate spending plans for different currencies. That can work when the financial lives do not need one combined availability view.

See the full European budgeting app comparison for prices, platforms, sharing, and official sources.

A one-week multi-currency test

1. Create the base-currency budget and two accounts in different currencies.
2. Enter or import their real cleared balances.
3. Make one normal purchase in each account.
4. Record one foreign card purchase and compare it with the bank's settled amount.
5. Record one cross-currency transfer using both amounts received and sent.
6. Change or refresh a rate and inspect what changed: valuation should move; original transactions should not.
7. Reconcile both accounts and check the combined category availability with the person who shares the plan.

If the app cannot explain every difference at the end of that week, do not move years of history into it.