What a change in the policy rate costs you each month

What does the policy rate do to my loan?

Nothing directly. The policy rate is what banks earn on deposits at the central bank. It sets the price at which banks lend to each other, and that shapes the rates they offer customers on mortgages and savings accounts. Your own bank still decides its own rate, and decides when to move it.

Norges Bank says it plainly: the policy rate applies only to banks' deposits in Norges Bank. Because banks find it cheapest to lend spare deposits to each other at that rate, the policy rate sets the price of interbank lending, and those rates in turn shape what banks charge customers on mortgages and pay on savings accounts.^[3]

Riksbanken describes the same chain from the other end. A change in the policy rate first moves the overnight rate between banks, and expectations about future short rates then feed into longer market rates, which pushes on the rates banks and mortgage institutions set. Some of these mechanisms work on the economy fairly quickly and others take much longer.^[4]

The practical version: the policy rate is a strong signal about where your loan rate is heading, not an instruction your bank has to follow. Banks compete, they fund themselves differently from one another, and they move at their own pace. A decision to hold rates still does not mean your bank will hold its own rate still, and a cut of 0.25 does not guarantee 0.25 off your loan.

How much does a rate change cost per month?

Multiply your loan by the size of the change, then divide by twelve. A rise of 0.25 percentage points on 2,000,000 is 5,000 a year, or about 417 a month before tax relief. The figure is the same in any currency, because it depends only on the size of the loan and the size of the change.

This is the one number worth working out for yourself, because it turns an abstract decision into a line in your budget. Take the whole of what you owe, not what you pay each month, and multiply by the change in percentage points.

Tax relief takes some of it back, at a rate your own tax authority sets. In Norway, general income is taxed at 22 per cent for 2026 and that same rate applies to deductions, so a rise costs you roughly 78 per cent of the figure above.^[7] In Sweden, a deficit in the capital income category gives a tax reduction of 30 per cent up to 100,000 kronor and 21 per cent above that for income year 2026, so within the first bracket a rise costs roughly 70 per cent of the figure above.^[8]

When does the change actually reach my account?

Later than the decision, and only after your bank tells you. Consumer credit law in both Norway and Sweden requires notice before a rate increase takes effect, and a fixed-rate loan is not affected at all until its fixed period ends. Savings rates follow the same logic in the other direction.

Two details in that table are worth knowing about. In Norway, a change of terms to your disadvantage cannot take effect until at least two months after you have been told, and a proposal to change interest, fees or other costs has to come with reasons.^[5] In Sweden, the lender has to apply a rate-change clause in your favour in the same way as against you, so the clause it uses to raise your rate is the clause it must use to lower it.^[6]

What should I do before the next decision?

Work out what a rise of 0.25 and of 1.00 percentage points would cost on your own loan, then decide in advance where that money would come from: the buffer, or a named category you would cut. Also check what you already pay in interest and fees today, which most people have never added up.

1. Find the number. Total debt times the change in percentage points, divided by twelve. Do it for a small change and a large one, so you know the range.
2. Decide where it comes from before you need it. Either the buffer account absorbs it for a few months, or one category in the budget shrinks by that amount. Deciding this while nothing is urgent is much easier than deciding it in the month the payment goes up.
3. Add up what you pay in interest and fees today. Go through a full year of transactions and total every interest charge and every account, card and loan fee. This is often a bigger number than the rate change being discussed.
4. Check the other side of the ledger. If loan rates are rising, savings rates usually are too, and the account your buffer sits in may be paying less than the one next to it.

What none of this involves is a prediction. Norges Bank said in June 2026 that a rise would likely be needed at one of the coming meetings, then held in August because inflation came in lower than projected.^[2] Riksbanken held in August too, while saying a rise later in the year remains possible.^[1] Both are explicit that what happens next depends on data neither of them has yet. Plan for a range instead of a forecast.

How Penge helps

The hard part of step three is finding the charges. Penge connects to more than 2300 banks in over 30 countries and categorizes your spending automatically when it is sure, so a year of interest charges and account fees can be totalled in one place instead of read off twelve statements. Give interest its own category, set a budget for it, and a rise shows up as a line that has moved rather than a vague sense that money is tighter. The connection is read-only, and your bank credentials are never stored.

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