How to Split Bills as a Couple When You Move In Together

When you move in together, splitting the bills is one of the first money conversations you’ll have. There are two common methods: 50/50, or in proportion to what each of you earns. Neither is right for every couple. The best split is the one that leaves you both with a fair amount left over after the bills are paid.

Step 1: Agree which bills are shared

Start by listing every bill and deciding which ones you’ll share. Shared bills usually include:

• rent or mortgage
• utilities: electric, gas, water, trash
• internet
• renters or homeowners insurance
• groceries and household supplies
• shared subscriptions

Personal bills, like your own phone plan, car payment, student loans or gym, often stay personal. Talk it through before you split anything. The CFPB’s Your Money, Your Goals toolkit includes a spending tracker that makes this conversation easier with real numbers.

Step 2: Choose a method

50/50

Each of you pays half of every shared bill. Simple, and fair when your incomes are close.

Proportional to income

Each of you pays the same percentage of your pay. The higher earner pays more in dollars, but you both give up the same share of what you make.

How to work it out:

1. Add your two take-home pays.
2. Divide each person’s pay by the total. That’s their share.
3. Each person pays their share of every shared bill.

A worked example

Say one partner takes home $3,600 a month and the other $2,400, and shared bills total $2,500.

	Partner A	Partner B
Take-home pay	$3,600	$2,400
Share of household income	60%	40%
50/50 split	$1,250	$1,250
Left after bills (50/50)	$2,350	$1,150
Proportional split	$1,500	$1,000
Left after bills (proportional)	$2,100	$1,400

With 50/50, Partner B has roughly half what Partner A has left. Splitting proportionally narrows the gap, and each partner puts about 42% of take-home pay toward shared bills.

Neither method is a rule. Pick one together and agree to revisit it when an income changes.

Step 3: Decide how the money moves

Three common setups:

1. A joint bills account. You each transfer your share on payday, and every shared bill comes out of it. Easy to track. At an FDIC-insured bank, the FDIC says deposit insurance covers $250,000 per depositor, per insured bank, for each account ownership category. Our guide to a separate checking account for bills shows how to work out the transfer.
2. One pays, the other transfers. Bills come out of one person’s account, and the other sends their share each month.
3. Divide the bills. One pays rent, the other pays utilities and groceries, roughly matching your shares. Simple, but it drifts as prices change.

If shared bills are on autopay, make sure both shares arrive before each payment date. The CFPB warns that if the balance is too low when an automatic payment is due, both the bank and the company might charge a fee.

Step 4: Hold a monthly money check-in

Ten minutes a month keeps it fair:

1. Look at what was paid last month.
2. Check whether any bill went up.
3. Confirm each person’s share for the coming month.

Put every due date on a shared calendar. The CFPB’s toolkit includes a bill calendar for this.

How to have the conversation

Money talks go better with a plan:

1. Pick a calm time, not right after a big bill arrives.
2. Bring the numbers: both take-home pays and the list of shared bills.
3. Agree the goal first: that you both have money left that feels fair.
4. Try both methods on your real numbers, like the table above, before you choose.
5. Write down what you agreed and when you’ll review it.

If one of you has debt or irregular income, say so early. It changes what’s fair, and it’s easier to plan for together.

When things change

Revisit the split when:

• either income changes
• you move or rent changes
• you take on a new shared bill

Keep it visible for both of you

A split only feels fair when you can both see it. A bill tracker like Billo keeps every bill and due date in one list and reminds you 3 days before each bill and on the day, so neither of you has to be the one who remembers.

Summary

• Agree which bills are shared before splitting.
• 50/50 for similar incomes; proportional when incomes differ.
• A joint bills account keeps it simple.
• Check in monthly and revisit when incomes change.

Want the numbers for your own household? Try our free split bills by income calculator. It runs in your browser and nothing you type is saved or sent.