Monthly cost, interest sensitivity and buffer
What a home actually costs each month, how much that swings with the interest rate, and what reserve is reasonable for your particular home.
Applies to: Sweden. Reviewed 2026-09-18.
Key takeaways
- Amortisation is a cash-flow cost but not a loss, it builds your own equity.
- A bostadsrätt fee can be raised. House running costs vary with weather and maintenance.
- Always model a rate clearly above today before you set your ceiling.
The items in a monthly cost
- Interest on the mortgage, after any tax relief which is settled afterwards.
- Amortisation at the statutory minimum or the higher level your bank requires.
- Monthly fee to the association, if it is a bostadsrätt.
- Heating, household electricity, water and sewage, waste collection and chimney sweeping for a house.
- Insurance, and for a property also the municipal property fee.
- Your own set-aside for maintenance, which you decide yourself.
Interest sensitivity
A one percentage point change is roughly one per cent of the loan per year, that is the loan divided by 1,200 per month. On a loan of three million kronor that is around SEK 2,500 per month before tax relief. Test several levels before you set your ceiling.
Buffer and maintenance reserve
There is no official standard for how large a buffer should be. A workable way to think: a reserve covering a number of monthly costs if income stops, plus money for the works a survey or maintenance plan has already identified.
Questions to ask
- What is included in the fee, and what do I pay on top of it?
- What have heating and electricity cost over the last three years?
- Are there decisions on fee increases or upcoming works?
Red flags
- The advertised running cost is a template figure with no backing.
- The monthly cost only holds if the rate stays exactly where it is today.
Sources
- Konsumenternas – independent guidance on mortgages and insurance (Konsumenternas Bank- och finansbyrå)
- Property fee and property tax (Skatteverket)