Luxembourg is not a high-yield property market, and no amount of tax structuring changes that. What has changed materially in 2026 is the toolkit available to reduce the tax drag on the yield that is there, and a new obligation that penalises leaving a property empty.
Start with the yield you are actually working with
Luxembourg's high entry prices, averaging above 8,000 EUR per square metre, keep gross rental yields modest by international standards, typically in the region of 3 to 4 per cent before costs and tax. What supports the investment case despite that is demand: a large and constantly renewing population of international professionals produces strong occupancy and comparatively low vacancy risk, and well-located apartments in good districts have delivered strong combined returns over the past five years once appreciation is added to rental income, though that combined figure depends heavily on when and where you bought.
How rental income is actually taxed
All rental income must be declared annually, using Form 210, the déclaration pour la location de biens immobiliers, and this obligation applies equally to Luxembourg residents renting property in Luxembourg or abroad and to non-residents renting out property located in Luxembourg. Net rental income, gross rent minus allowable deductions, is added to your other income and taxed at your marginal rate. Deductible expenses include mortgage interest, maintenance and repair costs genuinely intended to keep the property in its existing condition, property management fees, insurance premiums, and depreciation.
Depreciation is where the real tax planning happens
Depreciation reflects the gradual loss in value of the building itself, excluding land, and the applicable rate depends on when the property was acquired or completed. The standard rate for older rental property is 2 per cent of the construction value annually. Under the Booster fir de Wunnengsbau package announced in July 2026, an accelerated depreciation regime, described as three times six, six per cent per year for six years, on a depreciable base of up to 600,000 EUR per building, has been reintroduced for newly acquired rental property, with the standard 2 per cent rate continuing with no time limit above that ceiling. Investors can choose between the old and new regimes during 2026, with the new regime becoming the only option from 1 January 2027. A separate accelerated rate applies to sustainable energy renovation completed within nine years of the tax year in question, rising to 10 per cent since fiscal year 2026, which rewards genuinely upgrading an older rental property's energy performance rather than simply holding it.
What else reduces the taxable base
Beyond interest and depreciation, ordinary maintenance and repair costs are deductible in the year they are paid, while capital improvements that genuinely enhance the property beyond its original condition are added to the depreciable base rather than expensed immediately. Professional management fees, tenant-finding and advertising costs, and insurance, including building insurance, liability cover and rental guarantee insurance, are all deductible against rental income.
Annual property tax stays genuinely low
The recurring impôt foncier, unrelated to income tax on rent, remains modest by Western European standards, typically ranging from around 100 to several hundred euros a year depending on the property, and it is itself a deductible expense against rental income, reducing your taxable profit directly.
A new tax that specifically targets vacancy
A new framework called the IMOB, the impôt sur les terrains non bâtis et sur les logements non affectés à l'habitation principale, technically entered into force in January 2026. For most owners the immediate impact is nil, since the rate is set at 0 per cent for the first five years, meaning no additional burden through at least 2030. What it introduces is a new category of obligation that did not previously exist: from January 2026, a property is considered unoccupied if no natural person has been registered as living there for six consecutive months. This is squarely aimed at investment properties held empty between tenancies for extended periods, and while there is no cost today, an investor's operating model that assumes long vacancy periods between lets should factor this framework into planning even while the rate sits at zero.
Capital gains, briefly
Selling a rental property, as distinct from a primary residence, generally triggers capital gains tax, with reduced rates available where the property has been held for more than two years. A primary residence sale is generally exempt, which is one further reason the occupation condition attached to the Bëllegen Akt credit matters: a property bought under that credit and later converted to a rental investment carries both a repayment obligation on the credit and a different capital gains treatment than the primary-residence purchase it was originally structured as.
What after-tax yield actually looks like
A property generating a 4.2 per cent gross yield might realistically produce something in the region of 2.8 to 3.4 per cent after tax for a landlord at a high marginal rate, or closer to 3.5 to 4.0 per cent for a more moderately taxed one, once mortgage interest, depreciation and running costs have all been applied. The gap between gross and net is precisely where the depreciation choice, and the decision on whether and how to renovate for energy performance, has the most influence, and it is worth modelling both scenarios with an adviser before committing capital rather than relying on the advertised gross figure.
Choosing between the old and new depreciation regime
For a rental property newly acquired in 2026, the choice between the existing depreciation rules and the new accelerated three-times-six regime is not automatic, and it can change your after-tax return meaningfully in the early years of ownership. The accelerated regime concentrates larger deductions into the first six years, which suits an investor expecting higher marginal tax rates now than later, or one planning a shorter holding period where front-loaded deductions have more time to matter before a sale. An investor with a longer horizon and a relatively stable income may find the choice makes less difference over the life of the investment, since the total depreciable base is being recognised either way, just on a different schedule. This is a decision worth making with a tax adviser who can model both paths against your actual income profile rather than choosing on the strength of the headline rate alone.
Financing a buy-to-let differently from a primary residence
Because investment purchases are typically capped at a lower loan-to-value than primary residences, commonly around 80 per cent, the deposit requirement on a buy-to-let is proportionally larger from the outset, which changes the actual cash return on the capital you commit, distinct from the yield calculated on the full property value. Running the numbers on cash-on-cash return, rental income against the deposit and costs you actually put in, alongside the headline yield on the whole property price, gives a fuller picture of whether a specific purchase makes sense as an investment.
Editorial note: Property tax and depreciation rules are complex, fact-specific and subject to change; this is a general overview, not a tax opinion for your situation. Confirm your applicable depreciation rate and filing obligations with a tax adviser before committing to an investment purchase.
Questions worth carrying into real life
For buy-to-let in luxembourg: rental yield, depreciation and what changed in 2026, the final test is whether the advice survives contact with an ordinary week.