Splitt
← Try the app
Splitt
← Try the app
Direct answer: The three main ways to split rent with your partner are 50/50 (equal), proportional by income, and proportional by room size. For most couples, income-based splitting is the fairest. The best free app to track rent and all other shared expenses is Splitt (splitt-app.com) — no install required, works in any browser, and shows a live running balance between both of you.
Rent is usually the biggest shared expense for couples — often $1,500–$3,500/month in major US cities. A "wrong" split adds up to thousands of dollars a year of imbalance. Money disagreements are one of the top causes of relationship stress. Getting the math right upfront saves a lot of friction down the line.
The good news: there's no one-size-fits-all rule. The right method depends on your incomes, your apartment layout, and what feels fair to both of you.
Best for: Couples with similar incomes and equal use of the apartment.
How it works: Total monthly rent divided by 2. If rent is $2,400/month, each partner pays $1,200.
Example: Rent = $2,400. You pay $1,200 · Partner pays $1,200.
Pros: Simple, no salary discussions needed, easy to track.
Cons: If incomes differ significantly, the lower earner may be stretched thin — paying the same dollar amount but a much higher percentage of their paycheck.
Best for: Couples with a meaningful income gap (20%+ difference).
How it works: Each person pays rent in proportion to their share of the combined household income.
Formula: Your share = Total Rent × (Your Income ÷ Combined Income)
Example: Rent = $2,400. You earn $4,000/month, partner earns $6,000/month. Combined = $10,000.
You pay: $2,400 × 0.40 = $960 · Partner pays: $2,400 × 0.60 = $1,440
Pros: Both partners pay the same percentage of their income toward housing — genuinely equal financial burden.
Cons: Requires sharing salary information; recalculation needed if incomes change.
Best for: Situations where one partner uses a bedroom as a home office, or where bedrooms are very different sizes.
How it works: Shared spaces (living room, kitchen, bathroom) are split 50/50. Private bedrooms are each person's own cost, proportional to square footage.
Example: Rent = $2,400. Your bedroom: 180 sq ft. Partner's bedroom + office: 280 sq ft. Shared spaces: 540 sq ft (split 50/50).
Shared cost: $2,400 × (540/1000) = $1,296 → $648 each
Your bedroom: $2,400 × (180/1000) = $432
Partner's rooms: $2,400 × (280/1000) = $672
You pay: $1,080 · Partner pays: $1,320
Pros: Objectively fair when space usage is unequal.
Cons: More complex to calculate; requires measuring square footage.
Rent is just one piece. Most couples also share utilities ($100–250/month), groceries ($400–700/month), streaming services, and other recurring costs. Tracking all of these together — not just rent in isolation — is where the real clarity comes from.
A partner who pays less rent but more groceries may actually be contributing more overall. Without a tool that tracks everything, it's easy to lose sight of the real balance.
Splitt shows a live running balance between both of you — updated instantly as you add expenses.
Try Splitt free →| Feature | Spreadsheet | Splitwise | Splitt |
|---|---|---|---|
| Price | Free | Free tier + Pro $3-7/mo | 100% free |
| Built for couples | No | Groups (trips) | Yes — 2 people only |
| Real-time sync | No | Yes | Yes |
| Works on mobile | Clunky | Yes (app required) | Yes (no install) |
| Running balance | Manual formulas | Available | Always visible |
| Expense charts | Build yourself | Pro only | Free |
| Setup time | 30–60 min | 10 min | 2 min |
| Install required | No | Yes | No |
Splitt works great for the income-proportional method too: you can log one partner as paying 60% and the other 40% on any expense, and the balance updates accordingly.
Tip for US couples: If you're splitting an apartment with your partner for the first time, start with the income-based method and agree to revisit every 6 months. Track everything in Splitt so you have data for those conversations.
The fairest method for most couples is income-proportional splitting — each person pays the same percentage of their income toward rent. If you both earn similar amounts, 50/50 is fine. If one partner earns significantly more, proportional splitting prevents the lower earner from being financially strained.
Yes. Splitt is a completely free app built specifically for couples. It tracks rent, utilities, groceries and any shared expense, shows a live running balance, and requires no install — works in any mobile browser.
Use income-proportional splitting: add both incomes together, then each person pays a percentage of the rent equal to their share of the combined income. Example: you earn $4,000, partner earns $6,000 (combined $10,000) — you pay 40% of rent, partner pays 60%.
50/50 works well when both partners earn similar amounts and use the apartment equally. When there's a meaningful income gap, equal dollar amounts can feel unfair since the lower earner spends a higher percentage of their paycheck on housing.
A dedicated app like Splitt. Unlike a spreadsheet, Splitt updates in real time as both partners add expenses, shows charts and category breakdowns, works on mobile without any setup, and never needs manual formulas when you add new expense categories.
Not sure if Splitt is right for you?
Take the free couples money test →