How much does it cost to live on your own, and what should you calculate before moving out?
I'm Moni and I just moved out. The first thing I learned: living on your own costs more than the rent. Here's the full math I wish I had done before signing the lease.
MoniFor anyone just starting out.
Updated
Rent is only one part
When you look for a place, you compare rents. But rent is only one part of what it costs to live on your own. Then come utilities (water, electricity, gas), internet, your phone, building fees if there are any, groceries, cleaning supplies, transport from the new place and everything your family used to cover without you noticing: toilet paper, detergent, salt, trash bags.
The most common mistake is signing because the rent “fits” your salary, without adding up the rest. Add it all up before you sign: that way you know whether that place lets you live comfortably or leaves you counting coins at the end of every month.
Step 1: add up all your fixed costs
List everything that's due each month, with its date: rent, utilities, internet, phone, building fees, any loan payments you already have. For utilities, ask the landlord or the current tenant how much the bills usually come to; in a new place they're easy to underestimate.
Check transport too: living farther away can mean cheaper rent but more spent on fares and time. That number belongs in the same calculation.
Step 2: work out your real grocery bill
Track a month of food before you move: what you eat at home, lunches out, deliveries and snacks. It's easy to come up short, because while you live with your family a lot of things just appear in the fridge without anyone charging you for them.
Add cleaning and household supplies too. With a month of real data you have a number you can actually use, instead of an optimistic guess.
Step 3: save for the move before you go
The deposit, the furniture and the first month all arrive at once, right when you have the most expenses. Make a list of the essentials for the first few days: a bed, something to cook with, curtains, basic cleaning supplies. The rest can wait, come secondhand or be a gift.
Turn that move-in money into a goal with a date and save it before you move. That way you don't start your new life paying off the fridge in installments.
Step 4: make sure you have enough left to live on
With fixed costs set aside, look at what you have left for everything else: groceries, transport, treats, savings and surprises. If it's too little, adjust before you sign: look for a cheaper place, share with someone you trust or wait a few months while you save. Changing plans is much easier before signing than after.
A trick that worked for me: living for a month as if I had already moved. Every payday I set aside what rent and utilities would cost and lived on the rest. If that month goes well, the math works; and what you set aside is already part of your move-in money.
Frequently asked questions
How much money do I need to move out on my own?
You need two numbers. The first is the move-in cost: deposit, first month's rent, furniture and household basics. The second is your monthly cost: rent, utilities, internet, phone, groceries, cleaning supplies and transport. Save the move-in cost before you go, and confirm that after the monthly cost you still have room for savings, treats and surprises.
How much of my salary should go to rent?
There's no percentage that works for everyone, because it depends on your city, your salary and your other expenses. The practical test is this: after paying rent and all your fixed costs, do you still have enough for groceries, transport, a little savings and the occasional treat? If not, that rent is too high for your month.
Is it better to live alone or share a place?
It depends on your numbers and what you want. Sharing with someone you trust lowers rent and utilities, and can help you save for the move or your emergency cushion. Living alone gives you more independence, but every fixed cost is on you. Run the full math for both options and compare how much you'd have left in each.
This is financial education, not advice: Oslo doesn't recommend loans or investments. Decisions about your money are yours.
