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By Alex Diaz · How we calculate this
Breaking an existing lease early typically runs one to two months' rent in fees, and setting up the new shared place adds another security deposit - commonly one to one-and-a-half months' rent - plus first month's rent, all due before either of you has saved a dime from splitting costs going forward. That upfront number is usually the real surprise, not the day-to-day savings people expect from combining households.
These key factors affect the affordability of moving in together
Breaking or transferring an existing lease
Walking away from a lease mid-term usually costs a lease-break fee of one to two months' rent or a forfeited security deposit, and depending on your state, a landlord may also be able to hold you liable for rent until a replacement tenant is found. Reading the actual lease language before picking a move-in date, rather than after, is the difference between a clean exit and a bill that shows up months later.
New security deposits and shared furniture
A new shared lease means a fresh security deposit, commonly one to one-and-a-half months' rent, plus first month's rent, both due upfront and both separate from whatever deposit you may or may not get back from your old place. Combining two households also tends to surface duplicate furniture and appliances - two couches, two full sets of kitchenware - that need selling, donating, or storing, and couples who don't budget for this upfront sometimes end up financing replacement furniture they hadn't planned to buy.
How you'll split ongoing costs
Splitting everything 50/50 sounds fair until one partner earns considerably more than the other, at which point an equal split can quietly cost the lower earner a much bigger share of their paycheck than it costs the higher earner - some couples split proportionally to income instead, so each person contributes a similar percentage rather than a similar dollar amount. There's also a liability question worth settling before signing: a lease with both names on it makes you jointly and severally liable for the full rent even if your partner stops paying, while a lease in only one name leaves the other person with no legal obligation to the landlord at all, which changes what happens if the relationship doesn't work out.
How to use your results
- Check your current lease for early termination fees before setting a move-in date.
- Add up new deposits, first month's rent, and any furniture gaps separately from moving-truck costs.
- Agree on how you'll split rent, utilities, and groceries before the move, not after the first bill arrives.
Ways to make moving in together more affordable
- Time the move around your lease renewal date to avoid early termination fees.
- Sell or donate duplicate furniture and appliances instead of paying to move and store items you won't need.
- Split moving costs like a rental truck or movers evenly and agree on it in writing beforehand.
- Keep some individual emergency savings even after combining household expenses, in case the living situation changes.
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