How to split expenses as a couple without a joint account

You can split expenses as a couple while keeping separate bank accounts. Agree which costs are shared, choose a split for those costs, and keep a record you can both review. A joint account is one option, but it is not required to calculate or record your shares.

There is no single ratio that suits every household. An equal split is easy to calculate; an income-based split adjusts contributions to your earnings. The useful choice is one you both understand and can revisit.

Start with what counts as shared

Make a short list together: perhaps rent, groceries, utilities, and meals you have together. Decide whether personal purchases, existing debts, or gifts stay outside that list.

Be specific about exceptions. If one person buys lunch at work, is that personal? If you choose a more expensive holiday, will it use the usual split? Agreeing before you record a cost makes the record easier to interpret later.

You do not have to expose every personal purchase to maintain a shared record.

Compare 50/50 with a split based on income

Consider an example where Alex takes home €3,000 a month and Sam takes home €2,000. Their combined monthly take-home income is €5,000, and they have agreed to share €1,500 of household expenses.

To calculate an income-based share:

Your share = your take-home income ÷ combined take-home income.

Alex’s share is €3,000 ÷ €5,000 = 60%. Sam’s is €2,000 ÷ €5,000 = 40%. Apply those percentages to the expenses you have agreed to share.

In this example, the income-based method uses 30% of each person’s take-home income. Under 50/50, the contributions use 25% of Alex’s income and 37.5% of Sam’s. Those numbers describe the difference; they do not decide which arrangement you should choose.

Use the same income period and basis for both people. If income varies, agree which period to use and when to review it. If one person has no income, or the combined amount is zero, agree a contribution directly rather than relying on the formula.

Another option: divide whole bills

One person can cover groceries while the other pays utilities, for example. This can reduce the number of payments between you, but the amounts may change from month to month. Compare the totals occasionally to see whether the arrangement still matches what you intended.

You can also choose a different ratio for an individual expense. The key is to make the exception visible instead of assuming the other person will remember it.

Record the split separately from the payment

Suppose you use 60/40 for an €80 dinner. One share is €48 and the other is €32, regardless of which person hands over a card at the restaurant.

Recording those shares does not move money. Agree separately how you will handle any payment between you and avoid recording the same dinner twice as two unrelated shared costs.

If you want more background on the methods, National Bank’s guide to splitting expenses also walks through equal and proportional contributions.

How partner sharing works in Spendimo

Spendimo is a personal expense tracker for iPhone and iPad, available on the App Store. Its Pro partner feature lets you share selected expenses while keeping your personal records separate.

1. Connect your accounts. One person with Pro sends a partner invitation. The other person joins with their own account. If the invitation requires identity confirmation, the sender confirms who joined before sharing starts.
2. Choose the expense to share. Enter the amount or scan a receipt and review its details. Mark the record as shared and set the agreed split.
3. Review it together. Your partner can approve or dispute the shared record. Each of you sees your own share in your personal totals.
4. Keep personal spending separate. Entries you have not shared and your personal totals remain private. Sync and partner updates require an internet connection.

For the €80 example, set the agreed ratio to record €48 and €32. The income-based calculation above helps you choose that ratio; it is not a claim that Spendimo automatically calculates a ratio from your salaries.

Spendimo does not connect to a bank, transfer money, or pay shared bills. See how tracking without a bank connection works for the entry and privacy details.

Do both partners need a paid subscription?

One Pro subscription covers both partners. The person sending the invitation needs Pro; the invited partner does not need a separate subscription to join. Both use their own accounts.

Personal tracking is available in Free, including unlimited entries, single receipt scanning, basic trends, recurring bills, and CSV export. Partner sharing is a Pro feature. See the Free and Pro comparison; available plans and subscription prices are shown in the app before purchase.

Receipt scanning happens on the device. Photos stay local unless optional Pro receipt sync is enabled. If a photo on a shared record is synced, your partner can view it too. The Privacy Policy explains the storage and deletion details.

Review the agreement when circumstances change

Revisit your split when income, rent, or other shared costs change. A brief check-in can cover three questions: are the recorded costs complete, do you both agree with the split, and does the arrangement still suit you?

The record helps you see what happened. You decide together what to do next.