Turning a promising apartment into a real acquisition budget

Between liking a property and being able to buy it sits an arithmetic exercise most buyers do backwards. The price is the smallest of the four numbers that decide whether the purchase works.

Number one: the acquisition costs, which you cannot borrow

Registration and transcription duties in Luxembourg amount to 7% of the price, being 6% registration and 1% transcription, collected by the notary for the Administration de l'enregistrement, des domaines et de la TVA. The notary's emoluments are set by regulation and run to roughly 1% to 1.5% of the price, with VAT on top, plus disbursements and, where you borrow, the cost of the mortgage deed.

These costs are normally excluded from mortgage financing and must come from your own funds. That is the constraint that catches buyers who have carefully assembled a deposit and then discover that the deposit and the costs are two separate requirements.

Against the duties sits the Bëllegen Akt. It is a tax credit on the registration and transcription duties of €40,000 per buyer, so €80,000 for a couple acquiring together, and it has been permanent at that level since July 2025. The notary applies it at the deed with no separate application. A minimum of €100 in duty remains payable in all cases, and the credit is personal and lifelong, so an unused balance stays available for a future principal residence.

Two conditions decide whether it applies. You must occupy the property personally and effectively as your principal residence, from entry into possession or within two years. And to combine two credits, the deed must record a joint acquisition en indivision; where only one partner is named as buyer, only that person's credit applies.

Number two: what the bank will actually lend

Lending limits follow CSSF Regulation 20-08 of 3 December 2020, adopted on the recommendation of the Comité du risque systémique. The general loan-to-value principle is 80%, with differentiated treatment in practice: first-time buyers of a principal residence can be financed up to 100% of the price, other principal-residence purchases are generally capped at 90%, and buy-to-let at 80%.

The debt-service ratio frequently quoted at around 40% is a banking practice rather than a legal rule, and lenders assess remaining disposable income alongside it. A stress test is applied on top, so the loan is sized against a rate materially higher than the one you are offered.

Two further levers exist for eligible buyers. The State housing guarantee, under the amended law of 25 February 1979, can cover a share of the loan subject to household income conditions and to occupation as a principal residence, and is applied for through the Ministry of Housing. Interest subsidies and savings premiums operate separately, with their own conditions.

Number three: the works

Price the property on services and structure, not on surfaces. A dated kitchen is cheap; a 1970s electrical installation behind a new kitchen is not. Ask for indicative pricing per trade rather than a single global figure, because a total cannot be interrogated and a figure per trade shows where the risk sits.

Two Luxembourg-specific points change the number. Qualifying works on a principal residence can fall under the super-reduced housing VAT rate of 3% rather than the standard rate, subject to conditions and a cap on the advantage, so a quotation at the standard rate may overstate your cost. And where the property is classed F to H on its energy passport, lenders generally expect the works to sit inside the financing plan rather than to be deferred, which means the renovation is assessed as part of the purchase rather than after it.

Number four: the building's obligations

In a copropriété you acquire a share of the common parts expressed in millièmes, and the collective obligations arrive as invoices. Three figures quantify them.

• Reconciled charges for two completed years, which show what the building actually costs rather than what the monthly provision suggests.
• The fonds de travaux, compulsory in every Luxembourg co-ownership since 1 August 2023 under the law of 30 June 2022. The annual contribution is voted at the general assembly but cannot fall below a floor set by grand-ducal regulation per square metre of energy reference surface, graded by the building's thermal insulation class, and allocated pro rata millièmes. The Ministry of Housing has estimated €30 to €40 a month for an 80 m² apartment in a poorly performing building.
• Works voted and not yet called for, which are an existing liability rather than a risk.

Assembling the day-one figure

Take a €750,000 apartment bought by a couple, both first-time buyers with full credits available. Duties of €52,500 are absorbed by the €80,000 combined Bëllegen Akt, leaving the statutory €100 minimum and €27,500 of credit still available for the future. Notary emoluments plus VAT, disbursements and a mortgage deed remain, and those are real cash.

Now change one variable. If only one partner is named on the deed, €40,000 of credit applies against €52,500 of duty and €12,500 becomes payable. The property is identical; the paperwork is not.

Total acquisition costs commonly land between roughly 8% and 13% of the price for owner-occupiers after the credit, and materially higher for investors who cannot claim it at all.

The number nobody budgets: the cash left afterwards

A purchase that consumes every available euro leaves you exposed to the two things most likely to happen in the first two years: a call for funds voted by the general assembly, and a repair inside the apartment that the viewing did not reveal.

Hold a reserve sized against the building rather than against a rule of thumb. An older building with a thin works fund and a facade approaching renewal warrants a considerably larger buffer than a new build with distant liabilities. This reserve is separate from the renovation budget and separate from the acquisition costs, and it is the line most commonly deleted when the arithmetic gets tight.

What to settle before making the offer

Once an offer is accepted it leads to a compromis de vente, which is a binding contract rather than a preliminary step. Everything above should therefore be resolved before signature, not after.

Put the specific property to your bank rather than relying on a general pre-approval: this price, this energy class, this works estimate, this loan-to-value position. Establish your Bëllegen Akt position and how the deed will record the acquisition. And ensure the financing condition in the compromis is drafted by the notary with a realistic deadline, a stated amount and a stated rate, because it is the mechanism that protects you if the lending does not come through.

Three questions we are asked

Can acquisition costs be financed? Generally not, and they should be planned as cash. Where a first-time buyer is financed up to 100% of the price, that percentage refers to the price rather than to the total cost of acquiring.

Does the Bëllegen Akt cover the notary's fee? No. It reduces the registration and transcription duties only. Emoluments, disbursements and mortgage costs remain payable even where the credit absorbs the duties entirely.

What if I buy now and let the property later? The credit is conditional on personal occupation as a principal residence. Changing use has consequences, and it is a question for your notary and the tax administration before completion rather than after.