In this article
Why these are different from the Bëllegen Akt
The Bëllegen Akt, covered in our dedicated guide to registration duties and the Bëllegen Akt, and the 3% VAT rate reduce the cost of the transaction itself and are available to a wide range of buyers purchasing a main residence, regardless of income. The aids described here are different: they are capital or interest support paid by the State, means-tested against household income, and administered through the housing aid services rather than through the notary or the tax administration directly. Some buyers qualify for both categories at once; others qualify only for the transaction-cost reductions. It is worth checking eligibility for the income-tested aids even if you assume your income is "too high," since ceilings are recalculated periodically and household composition (number of children, a single income versus two) changes the threshold considerably.
The acquisition and construction grant
The prime d'acquisition ou de construction (sometimes described as an accession grant) is a one-off capital payment toward buying or building a main residence, aimed at households below a set income ceiling. The amount depends on household income and composition, and can be increased for specific housing types, such as an apartment in a multi-unit building compared with a detached house. A related complément de prime exists to top up the support for households at the lower end of the eligible income range. Because the exact income ceilings, base amounts and percentage increases are adjusted from time to time, do not budget around a specific figure found online, including in this article; check the current amounts and thresholds directly on guichet.lu or logement.public.lu before relying on them, and apply through the housing aid service (the "Guichet unique des aides au logement") once you have a firm project.
Applications generally have to be filed within a defined period after the notarial deed or the start of construction, so this is not something to leave until months after moving in.
The interest subsidy
The subvention d'intérêt reduces the effective interest cost on a mortgage taken out to buy or build a main residence, again subject to household income limits and a ceiling on the amount of the loan it applies to. It is reassessed periodically rather than granted once and forgotten, reflecting the fact that household income and the loan balance both change over the years. Because it interacts directly with your mortgage structure, it is worth raising with your bank at the pre-approval stage, alongside the questions covered in our mortgage guide, so any subsidy is factored into what the bank considers you can afford, and so the application is filed at the right point in the process.
The state guarantee for buyers with limited own funds
Luxembourg banks generally expect a buyer to bring a meaningful share of the purchase price, plus notary and registration costs, from their own funds, precisely because those costs cannot themselves be borrowed against the property in the usual way. For buyers who have saved steadily over several years but still fall short of what a bank would otherwise require, the garantie de l'État allows the State to guarantee a portion of the loan, easing the bank's exposure and, in principle, making the difference between an application being approved or refused. It is generally tied to a track record of regular saving over a period of years and to the loan covering a substantial share of the total project cost, and it applies only up to a capped amount. As with the other aids here, confirm the current ceilings and saving conditions before assuming you qualify.
A capital-linked savings incentive
Alongside the acquisition grant, there is a savings-linked aid rewarding households who build up funds specifically earmarked for a home purchase over time, generally requiring the funds to actually be used toward the purchase and to have been held for a minimum period with the same institution. This is worth knowing about well before you plan to buy, since the qualifying period is measured in years, not months; if you are still some way from a purchase, ask your bank whether a dedicated savings product exists that would position you for this aid later.
How to actually apply
The practical route for all of the income-tested capital and interest aids is the Guichet unique des aides au logement (single housing aid window), reachable through guichet.lu, which centralises the applications rather than requiring separate approaches to different administrations. In practice:
- Check current eligibility (income ceiling for your household size, residency requirements) on guichet.lu before you commit to a purchase.
- Gather income documentation for the relevant reference years, since eligibility is generally based on average income over a short look-back period rather than your income on the day you apply.
- File the capital grant application within the deadline that runs from the notarial deed or the start of works.
- Discuss the interest subsidy and any state guarantee with your bank as part of the mortgage application, since the bank is generally involved in requesting or confirming these.
What these aids do not cover
None of these schemes replace a normal down payment or remove the bank's own assessment of your ability to repay. They also do not apply to a second home or a purely rental investment; all of them are tied to the property being your own main residence, generally with a minimum occupation period written into the conditions. If you are buying to rent out rather than to live in, see our guide to buying to let in Luxembourg instead, which covers a different set of rules and incentives.
Our take
The capital grant, the interest subsidy and the state guarantee are the least-known part of Luxembourg's home-buying support, precisely because they are means-tested and administered separately from the notary's office, unlike the Bëllegen Akt or the 3% VAT rate that most buyers hear about automatically. If your household income sits below the professional-couple range that dominates the Luxembourg market, it is worth the extra paperwork to check whether you qualify, since the ceilings are reviewed periodically and can catch more households than people assume. Talk to us when you are house-hunting, so we can flag properties and price ranges where these aids make a genuine difference, or browse our current listings to start.
Sources
This article describes general rules and market practice in Luxembourg and is not legal, tax or financial advice. Rules and announced measures change; confirm the position that applies to you with a notary, your bank or a tax adviser before signing.
