How to Split Rent and Utilities with Roommates Using FairSplitter

Splitting rent and monthly bills with roommates creates a recurring tracking problem — different people pay different bills, amounts vary month to month, and keeping mental track quickly falls apart. FairSplitter's Home group type is built for exactly this.

Initial Setup: Create a Home Group

Do this once before the first month begins.

1. Tap the Groups tab → tap + in the top-right corner.
2. Set Group Type to Home.
3. Name it something clear — "Apartment 4B", "123 Oak St", or just your address.
4. Set the Default Currency to your local currency.
5. Turn Simplify Debts on (it's on by default). For roommates with multiple bills paid by different people, this reduces the number of transfers needed each month.
6. Under Add Members, add all roommates by name, phone number, or email. They don't need the app installed to be added.
7. Tap Create Group.

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Monthly Workflow

Each time someone pays a shared bill, they add it as an expense in the group. This takes about 20 seconds.

Adding a Bill

1. Tap + on the Home tab (or from inside the group).
2. Fill in:
   • Description: "January Rent", "February Electricity", "Internet – March"
   • Amount: The bill total
   • Group: Select your Home group
   • Paid by: The roommate who paid this bill
   • Split with: All roommates who share this bill
3. Choose a split method:
   • Equal — for bills split the same way (utilities, internet, groceries)
   • Percent — for rent split by room size (see below)
4. Tap Save.

Repeat for each bill as it gets paid throughout the month.

Settling at Month End

At the end of the month:

1. Go to the Groups tab → open your Home group.
2. Check the Balances view — it shows the net amount each person owes or is owed.
3. With Simplify Debts on, you'll see the minimum number of transfers needed (often just one or two payments, even with many bills).
4. Each person who owes money pays their amount and records it via Settle up on the Home tab.

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Splitting Rent by Room Size

If your rooms are different sizes, equal splitting isn't fair. Use the Percent split method.

How to calculate your percentages:

Your percentage = (Your room's square footage / Total apartment square footage) × 100

Example: 3-bedroom apartment, $1,800/month rent

• Alice (master, 200 sq ft): 200/450 = 44% → $792
• Bob (mid room, 150 sq ft): 150/450 = 33% → $594
• Carol (small room, 100 sq ft): 100/450 = 22% → $396

To add this in FairSplitter:

1. Add expense: "January Rent", $1,800
2. Tap the split row → select Percent
3. Enter 44% for Alice, 33% for Bob, 22% for Carol (adjust so it totals 100%)
4. Set Paid by to whoever paid the landlord

You only need to set this up once — when you edit and re-add rent each month, you can reference the same percentages.

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How Simplify Debts Saves Transfers

Without simplification, each pair of roommates tracks a separate balance. In a 3-person apartment after a month of bills:

• Alice paid rent → Bob and Carol each owe Alice
• Bob paid electricity → Alice and Carol each owe Bob
• Carol paid internet → Alice and Bob each owe Carol

That could be up to 6 separate transfers to settle.

With Simplify Debts on, FairSplitter calculates the net: maybe Alice owes Carol $15, and Bob owes Carol $40, and that's it — 2 transfers instead of 6. The money flow is optimized while the individual expense records stay intact.

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Handling Shared Groceries and Household Supplies

Beyond fixed bills, you can track shared groceries, cleaning supplies, and household purchases the same way:

1. Tap + → set Group to your Home group
2. Description: "Groceries – week of March 3", "Cleaning supplies", "Toilet paper run"
3. Split equally among everyone who benefits
4. Tap Save

These accumulate throughout the month and are settled along with bills at month-end.

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Handling One-Off Purchases (Furniture, Appliances)

For bigger shared purchases:

1. Add the expense normally with Group set to your Home group
2. Decide upfront (as a house): does this item belong to the person who bought it, or does it stay with the apartment?
3. If it stays with the apartment, split the cost equally — everyone's paid their share regardless of who leaves first

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What to Do When a Roommate Moves Out

1. Settle all outstanding balances with the departing roommate before they leave (tap their name on the Home tab → Settle up)
2. Remove them from the group (open the group → Members → remove)
3. Going forward, only current roommates are included in new expenses

Their expense history stays in the group for your records.

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Common Questions

What if a roommate pays a different amount each month (variable utilities)?

Add a new expense each month with the actual amount. FairSplitter doesn't assume recurring amounts — each expense is logged as it happens, which keeps things accurate.

Can one person be responsible for paying the landlord while everyone else reimburses them?

Yes. Set Paid by to the person who pays the landlord. Everyone else's share becomes what they owe that person. When they transfer money, each records it via Settle up.

What if a roommate doesn't want to use the app?

Add them by name only. You track their balance locally — they just need to know what they owe and pay via whatever method works for them. You record the settlement in FairSplitter on your side.

Should we settle monthly or wait until someone moves out?

Monthly is strongly recommended. Letting balances accumulate for months makes settlement awkward and harder to verify. A quick settle at month-end keeps things clean and prevents resentment from building.

How do we handle the security deposit?

Add it as a single expense in the group, split equally (or proportionally if rooms differ significantly). When it's returned, add it as a negative expense or record each person's share of the return.