Roommate Savings Calculator
Living alone feels like freedom until you run the numbers. This calculator shows your monthly savings across rent, utilities, groceries, and subscriptions — then projects what those savings become when invested. $700/mo at 7% average returns compounds to $120,000+ over a decade. Privacy has a price tag, and now you know exactly what it is.
Find out exactly how much money you save by living with roommates instead of alone. Compare solo rent, utilities, and grocery costs against shared living expenses to see your monthly, annual, and five-year savings. Then see what those savings would grow to if invested over ten years at average market returns — the true financial impact of choosing roommates over solo living.
Solo Living
Full rent if living alone
Electric, gas, water, internet
Monthly grocery bill living alone
With Roommates
Your portion of the total rent
Your share of split utilities
Your share of shared grocery runs
Optional — for your reference
2 people total in the household
How This Calculator Works
Enter Your Details
Fill in amounts, people, and preferences. Takes under 30 seconds.
Get Fair Results
See an instant breakdown with data-driven calculations and Fairness Scores.
Share & Settle
Copy a shareable link to discuss results with everyone involved.
Frequently Asked Questions
People Also Calculate
Cost Compare
Solo: $2,800/mo. One roommate: $1,700/mo. Two roommates: $1,200/mo. See the full cost breakdown for every scenario from 0 to 6 roommates.
Rent Split
Your roommate with the master suite shouldn't pay the same as the person in the closet-sized room. Split rent by square footage, features, and income — with a Fairness Score.
50/30/20 Budget
On a $4,500/mo take-home, the 50/30/20 rule gives you $2,250 for needs, $1,350 for wants, and $900 for savings. See your exact breakdown — adjusted for rent.
Roommate vs Alone
Solo rent at $2,400/month eats 49% of a $5,500 income. With a roommate, it drops to 25%. See if you can actually afford to live alone.
Savings Rate
Find your real savings rate as a percentage of take-home pay. See how you stack up by age group and project your wealth at 10 and 20 years out.
Betrayal Score
Paying $1,200/mo for the small room while your roommate pays $1,200 for the master suite with an en-suite bathroom? Get your Betrayal Score and the receipts.
Affordability
The 30% rule says you can afford $1,500/mo on a $60K salary. Factor in student loans and your real number drops to $1,100. Get your actual budget.
Rent vs Buy
At 7% mortgage rates, buying isn't automatically smarter than renting. Compare true costs over 1-30 years including equity, taxes, maintenance, and opportunity cost.
Net Effective Rent
A $3,000/mo apartment with 2 months free actually costs $2,500/mo. Convert any concession package into the real monthly cost and compare up to 10 apartments.