# Splitting bills with a partner when you own the house

Canonical URL: https://www.evenoutapp.com/guides/split-bills-with-partner-when-you-own-the-house
Updated: 2026-10-06

Separate running costs (utilities, internet, groceries, small repairs) from ownership costs (mortgage, property tax, structural repairs). Your partner shares the running costs, either as a share of each bill or as a fixed monthly amount with a written label. This page covers the arithmetic only, not ownership, tenancy or tax questions.

Key points:
- Sort costs into running costs (utilities, internet, groceries, small repairs) and ownership costs (mortgage, property tax, structural repairs).
- Model 1: your partner pays half of each running bill. On $1,040 of bills a month, that is $520.
- Model 2: a fixed monthly amount such as $500, with a written label for what it covers and a check every three months.
- A partner who moves in on the 19th of a 30-day month pays 12 ÷ 30 of the month: $200.00 of a $500 contribution.
- In EvenOut, use a friend page or a Household group, the Home category, and a monthly Repeat for the fixed amount.

## What is the difference between running costs and ownership costs?

Running costs are what it takes to live in the house each month, and ownership costs are what it takes to hold the house. Your partner uses the first kind every day, so that is the natural place to start sharing. Say a typical month looks like this (made-up numbers).

**Running costs, $1,040 a month:**

- Electric and gas: $190
- Water and trash: $85
- Internet: $75
- Groceries: $640
- Small repairs and supplies: $50

**Ownership costs:**

- Mortgage: $1,450 a month
- Property tax: $380 a month ($4,560 a year)
- Structural repairs, such as a $9,000 roof: one-off

Agree where the line between a small repair and a structural one sits, and write the dollar figure down. Without a figure, every repair becomes a new negotiation.

## Model 1: how does your partner pay a share of the running costs?

Your partner pays an agreed share of each running bill and nothing toward the ownership costs. Half of $1,040 is $520 a month. Bill by bill, that is $95.00 for electric and gas, $42.50 for water and trash, $37.50 for internet, $320.00 for groceries and $25.00 for small repairs and supplies.

You pay each bill as it arrives, record it with your partner's half and settle once a month. The strength of this model is that it always matches the real bills. The cost is that every bill has to be recorded.

## Model 2: how does a fixed monthly contribution work?

Your partner pays the same amount every month and you pay the bills. A fixed amount is easy to plan around, but real bills move, so it needs a written label and a regular check. The label is one line that says what the money is for.

> Household contribution: running costs only (utilities, internet, groceries, small repairs). Not mortgage, property tax or structural repairs. Reviewed every 3 months.

The label records what you both meant. Say you agree on $500 a month, a little under half of a typical month. A fixed amount stays steady while half of the bills moves with the season, as these three months show.

| Month | Half of the bills | Fixed contribution |
|---|---|---|
| Typical, $1,040 of bills | $520.00 | $500.00 |
| Winter, $1,180 of bills | $590.00 | $500.00 |
| Summer, $960 of bills | $480.00 | $500.00 |

Over those three months the bills come to $3,180, so half is $1,590, and the fixed amount has paid $1,500. The contribution is $90 short. Either your partner pays the $90, or you reset the monthly figure to $530 ($1,590 ÷ 3). That check every three months is what keeps a fixed amount fair.

## What if your partner moves in partway through a month?

Charge the first month by days: days in the house ÷ days in the month × the monthly amount. Say your partner moves in on September 19. September has 30 days, and the 19th to the 30th is 12 of them (30 minus 19, plus 1 for the day they arrive).

- **Fixed contribution:** $500 × 12 ÷ 30 = $200.00.
- **Half of the bills:** $520 × 12 ÷ 30 = $208.00.

It is the same arithmetic as [prorated rent](https://www.evenoutapp.com/glossary/prorated-rent), applied to a smaller number. From the second month on, the full amount applies.

## How do you set this up in EvenOut?

A friend page is a ledger for two. A "Household" group ("Rent and bills") does the same job and leaves room for more adults later. Both work with these steps.

1. **For a share of the bills,** tap "Add expense" for each bill, type the amount, choose "Paid by you" and leave the split on "Split equally". Pick the Utilities, Internet or Groceries category.
2. **For a fixed contribution,** add one expense called "Household contribution" for $500 with the "Home" category. Choose "Paid by you", then "Exact amounts", and type the whole $500 next to your partner's name and leave yours empty. The pill reads "All assigned" when the amounts match.
3. **Make it repeat.** Under "Photo, repeat, pending or note", set "Repeat" to "Monthly". The expense you save is the first one, and EvenOut adds each later one for you with the same payer and split. Setting up a repeat needs a connection.
4. **Settle up.** When your partner pays you, tap "Settle up" and record it. Partial payments work, so the balance shows what is still owed. The money itself moves outside the app, and EvenOut keeps the record.

Under both models the mortgage and property tax stay with you, so they never go into the shared ledger. The balance then shows only the shared bills.

## What does this page not cover?

It covers arithmetic and record keeping. Whether paying toward bills changes anything about ownership, tenancy or taxes depends on where you live and on your situation, and the people to ask are a lawyer or an accountant. If your partner wants to put money toward the mortgage, a renovation or a structural repair, treat that as a separate conversation and keep it out of the running-costs ledger.

## What should you do next?

Pick a model, write the label and put a date three months out in your calendar to check it. If you are still deciding between equal and income-based shares, [should couples split bills 50/50](https://www.evenoutapp.com/guides/should-couples-split-bills-50-50) works through both on real incomes. A partner who joins a lease instead of a house is covered in [splitting expenses when moving in together](https://www.evenoutapp.com/guides/split-expenses-when-moving-in-together). If you would rather pay the bills from one shared account, read [a joint account for bills only](https://www.evenoutapp.com/guides/joint-account-for-bills-only), and for the wider setup see [how to split bills as a couple](https://www.evenoutapp.com/guides/how-to-split-bills-as-a-couple).

## Frequently asked questions

### Can my partner pay by income instead of half?

Yes. Add the two take-home pays and divide. At $5,000 and $3,000, your partner's share is $3,000 ÷ $8,000, which is 37.5 percent, so 37.5 percent of $1,040 is $390 a month. In EvenOut, choose "Shares" and type 5 for you and 3 for your partner, which gives the same 62.5 to 37.5 split.

### Where does a $300 repair go, running costs or ownership costs?

That is for the two of you to decide before the bill arrives. One simple rule is a dollar limit: repairs under it count as running costs and are shared, and anything over it is discussed first. With a $300 limit, a $50 tap washer is shared and a $9,000 roof is not.

### Do we need a group in EvenOut, or is a friend page enough?

A friend page is enough for two people. A Household group is worth it if a third adult may share some bills later. In a group, the owner can set "Who can edit" to "Only their own", so each person changes only what they added or paid for.

### What do we do when the bills rise and the fixed amount no longer fits?

Reset it at the three-month check. In the example, half of three months of bills is $1,590, which is $530 a month, up from $500. In EvenOut, tap "Stop repeating" on the old contribution and add a new one at $530. Expenses already added stay as they are.