Fixed or variable rate: Your choice in 2026

At the start of 2026, a 30-year fixed-rate mortgage loan (realkreditlån) was at around 4 per cent, while the F5 rate at Nordea Kredit’s auction for 1 January 2026 came in at 2,66 per cent. That is a difference of about 1-1,5 percentage points.

The choice between a fixed and a variable rate is no longer one where most people automatically play it safe. According to Nationalbanken (Denmark’s central bank), 72 per cent of private customers’ new mortgage loans in March 2026 had a variable rate. In the same month, the average rate on new mortgage loans was 3,11 per cent excluding contribution fees (bidrag).

The figures alone will not decide it for you. What matters most is not which rate is at the top of the list, but which risk and time horizon you can live with. A loan with a short rate-fixing period can look cheap today and completely different in two years, while a fixed-rate loan costs more now to give you peace of mind for the rest of the term.

That is why this article takes you through the loan types, current interest rate levels, the rules and requirements, and how refinancing comes into play. The aim is to help you make a well-informed choice rather than chase the lowest percentage.

A fixed-rate loan gives you security with a known payment

A fixed-rate loan is one of the two main routes when you need to finance a home. Here you lock in the interest rate for the entire term of the loan, so your payment stays the same from the moment you sign the papers until the loan is paid off. You know in advance what you will pay each month, whether market rates rise or fall.

That predictability makes it easy to budget for the next 30 years. No surprises in your online banking, no sudden jumps in your payment, no need to keep an eye on rate-setting meetings or the bond market.

At the start of 2026, the rate on a 30-year fixed-rate loan was around 4 per cent before contribution fees. Including contribution fees, the average rate on new mortgage loans with the rate fixed for more than 10 years was 4,7 per cent in January 2026 and 4,8 per cent in August 2026, according to Nationalbanken. It is still the type of loan most people compare with.

The bond price also plays a part. According to Realkredit Danmark, the price of a 4 per cent fixed-rate loan was about 95 in September 2026. When the price is below 100, you get less money out of each bond than you have to pay back. That helps explain why a fixed-rate loan costs 5.440 kr. a month before tax per million borrowed. At the same time, it cost 45.000 kr. more to have one million kr. paid out with the fixed-rate loan than with loans traded at a price of 100.

You pay more now, and more to have the money paid out, in return for a payment that cannot change. If your finances are tight or your time horizon is long, that peace of mind may be worth the extra money. If you have room in your budget and a shorter horizon, the fixed-rate loan may feel like insurance you might never need.

Variable-rate loans: Types, rate adjustment and current levels

With a variable-rate loan, the interest rate is not locked for the entire term but is reset at fixed intervals. How often that happens depends on the type of loan, and that determines how much uncertainty you need to be prepared for.

• The F1 loan gets a new rate every year and has the most frequent adjustment of all the adjustable-rate loans. Some lenders, such as Nordea Kredit, no longer issue new F1 loans.

• The F3 loan is adjusted every three years and sits halfway between a low rate and a stable payment.

• The F5 loan gets a new rate every five years and offers more predictability, but typically also a slightly higher rate.

• The F10 loan is adjusted every ten years, so you fix the rate for a considerably longer period at a time.

• F-kort is a loan with a short rate-fixing period. At Nordea Kredit, the rate has been around 2,6 per cent since 1 July 2026, while in the first half of 2026 it was around 2,4 per cent.

• Over the same period, the F3 loan was at about 2,2-2,4 per cent, while the F5 loan was at around 2,5-2,7 per cent. At Nordea Kredit’s auction for the rate adjustment on 1 October 2026, the level was higher: F1 3,1 per cent, F3 3,0 per cent and F5 3,2 per cent.

The difference between the five loan types is not whether the rate can move, but how rarely it does. The longer the interval, the fewer times you have to deal with a new payment, and the less uncertainty there is in your monthly finances.

The figures from Nationalbanken show how widespread variable rates have become. In March 2026, the rate on new variable-rate loans rose by 0,35 percentage points, and at the same time these loans made up 72 per cent of private customers’ new mortgage loans. However, the rise had only a slight effect on total debt, because existing loans are only affected when they are refinanced or remortgaged. The average rate on private customers’ total mortgage debt rose only marginally, by 0,02 percentage points in March 2026, to 2,60 per cent.

F-kort loans: The shortest rate-fixing period and what the margin means

An F-kort loan has the shortest rate-fixing period of all the variable loan types. The rate is adjusted every six months, which is both why it is the lowest and why it is the most sensitive to fluctuations.

It is worth knowing exactly how the rate is calculated, because the margin is a fixed part of the sum. In January 2026, the CITA6 reference rate was 1,8065 per cent, and the homeowner’s rate was then 1,8065 per cent × 365/360 + 0,59 per cent = 2,42 per cent. The conversion by 365/360 is made because the money market counts a different number of interest days than a calendar year has, and only after that is the margin added on top.

The margin varies from loan to loan. Examples from 2026 are 0,51 per cent, 0,59 per cent and 0,64 per cent, and depending on the margin you are offered, the total rate ends up between about 2,34 per cent and 2,47 per cent. That is why it is not enough to look at CITA6 alone. Ask about the margin, because this is where two otherwise identical F-kort loans can end up costing different amounts.

A worked example shows clearly what this means in real money. With an F-kort rate of 2,41 per cent, a loan of 1 million kr. with repayments gives a monthly payment after tax of about 3.700 kr. By comparison, the payment in the 2nd half of 2025 was around 3.660 kr. at a rate of 2,24 per cent, so even a modest rate rise of 0,17 percentage points only shifts the payment by around 40 kr. a month.

Interest rate trends in 2026: What the banks and Nationalbanken say

Earlier in 2026, most banks pointed to moderate interest rate movements: short-term rates were expected to fall, while expectations for long-term rates ranged from unchanged to falling.

In February 2026, Nykredit expected around 1,7 per cent (CITA3) for the short-term rate and about 4,1 per cent for the 30-year fixed-rate loan up to March 2027. Sparekassen Kronjylland expected the rate on the 30-year fixed-rate loan to fall from 4,1 per cent to 3,4 per cent over 12 months, and Realkredit Danmark expected an F5 rate of between 2,4 per cent and 3,0 per cent over a 12-month horizon. So even when the direction was broadly the same, there was no agreement on the pace.

Short-term rates went the other way. On 11 June 2026, Nationalbanken raised its current-account rate (foliorente) by 0,25 percentage points to 1,85 per cent. It was the first Danish rate rise since 2023, and on 10 September 2026 another rise followed, to 2,10 per cent. Both times, Nationalbanken followed the European Central Bank.

That is why you should not plan your finances around a forecast. An interest rate forecast is the bank’s informed estimate, not a guarantee, and history is full of examples to the contrary. The financial crisis, COVID-19 and the surge in inflation in 2022 knocked every forecast off course, and that is worth remembering when you weigh up the interest rate trends in 2026.

Fixed rate or F5: Long-term security versus a lower payment

There is a rule of thumb you can use when choosing between a fixed rate and F5. If a rate rise of 1-2 percentage points would squeeze your budget, you should choose a fixed rate. It is not a technical calculation but a limit on how much uncertainty your finances can bear, and that limit varies from household to household.

An F5 loan fixes the rate for five years at a time and gives a lower rate than a fixed-rate loan over the same period. The trade-off is that you do not get the same long-term security. In August 2026, the average rate including contribution fees on new mortgage loans with the rate fixed for 3-5 years was 3,8 per cent, compared with 4,8 per cent for loans with the rate fixed for more than 10 years (Nationalbanken). You buy five years of predictability for a discount of around one percentage point, but after those five years you are back to a new rate adjustment and a new payment.

Nordea Kredit’s interest rate auction for the rate adjustment on 1 October 2026 shows how much the five-year fixing matters in practice. The F5 rate was set at 3,2 per cent, and an F5 loan of 1 million kr. with repayments gave a payment after tax of about 4.360 kr. The previous rate on the same loan was negative, and the payment was then around 3.740 kr. The difference of just over 600 kr. a month is because the rate moved from a very low level up to a more normal one.

A jump like that makes a five-year fixing a compromise rather than a solution. You do not have to think about the rate for five years, but you are also locked in if rates fall in the meantime, and you feel the whole increase at once when the adjustment comes. A fixed-rate loan would have given you the same payment all the way through, without your having to deal with the auction result.

That is why many people end up somewhere in between. A combination where, for example, 50 per cent of the loan is fixed-rate and 50 per cent is F5 gives you both a known payment on one half and a lower overall rate on the other. You do not get full security, and you do not get the lowest rate, but you spread the risk so that a single rate rise does not hit all of your finances at once.

Mortgage loans for buying a home: The rules and requirements that protect you

When you apply for a mortgage loan to buy a home, there are rules and requirements to make sure you do not end up with finances you cannot sustain. They are worth knowing in advance, because they can affect how much you can borrow and which loan you should choose.

• If you choose a variable rate, the executive order on good practice for home credit (god skik-bekendtgørelsen) says your finances must also be able to support a 30-year fixed-rate loan with repayments (Executive Order no. 1443 of 27.11.2025, § 19(1)).

• In Copenhagen and the surrounding municipalities and in Aarhus, the growth-area guidelines from Finanstilsynet (the Danish Financial Supervisory Authority) apply: if you choose a variable rate, your disposable income should as a rule be calculated at a fixed rate 1 percentage point above the current fixed rate, but at least 4 per cent.

• Under § 5 of the Danish Act on Mortgage Loans and Mortgage Bonds etc. (lov om realkreditlån og realkreditobligationer m.v.), owner-occupied homes for year-round use and private residential properties for letting can be mortgaged up to 80 per cent of their value, while holiday homes can be mortgaged up to 75 per cent.

• Office and commercial properties, as well as industrial and craft properties, can be mortgaged up to 60 per cent.

• A fixed-price agreement (fastkursaftale) locks the price of the loan from the day of the agreement until the loan is paid out, in return for a surcharge on the price, and it is most relevant for fixed-rate loans and where the handover is a long way off.

Pay particular attention to the requirement in the good practice executive order. Even if you choose a variable-rate loan, you are assessed on whether you could also manage a fixed-rate loan with repayments. In practice, then, the rules mean you need room in your budget whichever type of rate you end up with, and a loan with a short rate-fixing period does not in itself let you borrow more.

Refinancing your mortgage loan: When it pays off

Refinancing turns your mortgage loan into something you can adjust along the way, rather than something you lock in once and forget, but it is not a free move, and it is not always the right one. As a rule of thumb, the rate typically needs to move by at least 2 percentage points before refinancing a fixed-rate loan really pays off. If the movement is smaller, the costs often eat up the entire gain.

Refinancing typically costs 5.000-15.000 kr., depending on the mortgage lender and the size of the loan. That is money you pay here and now for a saving spread over many years to come. So it is not enough to look at how much your payment falls. You need to work out whether the saving actually exceeds the cost before you say yes.

The direction of interest rates determines what kind of refinancing you are looking at. If the rate falls from 6 to 4 per cent, it is called a down-conversion (nedkonvertering): you switch to a loan with a lower payment and feel the difference every month. If the rate rises instead, you can refinance and reduce the debt itself, because the price of the bonds behind your loan has fallen, so you can buy them back below a price of 100. These are two different gains, and they do not come at the same time.

Many people overlook when a change in interest rates actually hits them. Your existing loan is not affected just because rates rise tomorrow. That only happens at refinancing or remortgaging, that is, the points at which the loan is reset. New loans, on the other hand, feel the higher rate level directly from day one. If you have a loan you are happy with, there is no rush to act, even if the market is moving.

Variable-rate loans also come with a price spread (kursskæring), a small surcharge added by the mortgage lender. It is not a large amount in itself, but it matters most on loans that are refinanced often, above all F1, where the bonds are sold again every year. The more often the loan is refinanced, the more times you pay that small surcharge, and over a number of years it can make a noticeable difference to the overall cost.

Choose the right loan for buying a home: Your decision framework

When choosing the right loan for buying a home, there are four questions it pays to ask yourself before you say yes to an offer.

• Could you cope with an interest rate rise of 1-2 percentage points? If the answer is no, a fixed rate is the safe choice.

• What happens if the interest rate rises to 7 per cent? If that would mean no money for Christmas presents, or having to sell the house, the risk is too great and you should choose a fixed rate.

• Is the saving big enough to outweigh the risk? In 2026, the difference between fixed and variable rates is around 1-1,5 percentage points, so the saving from a variable rate is limited. It is only worth going for if you have some slack in your budget and can cope with fluctuations.

• When does it pay to switch from a variable to a fixed rate, and are you likely to reach that point before you sell?

The last question is the one most people skip. The break-even point for refinancing lies some way off in the future, and if you expect to sell within a few years anyway, you may end up paying the costs without ever recouping them. Both banks and mortgage lenders let you switch between fixed and variable rates along the way, so you are not locked in forever, but it is a decision that has to make financial sense, not one to take just because the rate has moved.

If your finances can absorb the fluctuations and you have some slack in your budget, a variable-rate loan may still be the cheapest way through the next few years. If you are in doubt, or if a rate rise would put a strain on your day-to-day life, the fixed rate is the peace of mind you pay for. If you choose based on your own finances rather than today’s lowest rate, you have made the right choice for you.