Home Savings Plan or Invest It Yourself? Pricing Luxembourg's Tax Break

Every year around tax season the same question comes back in Luxembourg: should you put money into a Bausparvertrag — a home savings contract — because the state lets you deduct it, or should you keep that money and invest it yourself?

Both sides of the argument are usually made badly. People who like the deduction say "it's free money" without asking how much money. People who prefer investing say "0.2 % is a joke" without pricing what the tax break is worth. Both numbers are public, so the question has an arithmetic answer rather than an opinion.

This page prices it, with the 2026 rules and one worked example you can re-run with your own marginal rate.

What is a home savings plan in Luxembourg, exactly?

A home savings contract has two halves. First you save, at a low but guaranteed rate. Then, once enough has accumulated, the provider offers you a loan at a rate that was fixed when you signed. The point was never the savings return — it is the tax deduction on the way in, and the pre-agreed loan rate on the way out.

Two details trip people up constantly.

The first is who you have to sign with. The deduction only applies to a contract with an approved Bausparkasse: in Luxembourg that means BHW Bausparkasse, Wüstenrot Bausparkasse or Bausparkasse Schwäbisch Hall, or an equivalent institution authorised in another EU member state. A product your ordinary bank calls a "home savings account" does not qualify. Guichet.lu is blunt about this: banking and financial institutions are excluded.

The second is what the money is for. The contract has to be aimed at your own housing needs — building, buying, maintaining or renovating a home you live in, buying the land for it, or repaying a loan taken for those things. The property can sit in Luxembourg or in another EU member state.

How much does the deduction actually give you back?

This is the mechanism that decides the whole comparison, so it is worth being precise about it.

Home savings contributions are a dépense spéciale — a special expense that comes off your taxable income. They are not a credit against tax owed. That means the euro value of the deduction is not fixed: it is your contribution multiplied by your top marginal rate, which is why the same €1,344 is worth four times more to a well-paid engineer than to someone at the start of their career.

Under article 111 LIR, the Administration des contributions directes caps the deduction at €1,344 a year if you were aged 18 to 40 at the start of the tax year, and €672 otherwise. The ceiling is multiplied by its own amount for a spouse or partner taxed jointly with you, and again for every child who gives you a tax reduction. A couple both under 41 with two children can therefore deduct up to four times €1,344.

Now the rate. Luxembourg's income tax scale runs from 8 % to 42 %, and on top of the tax you owe there is a 7 % employment-fund surcharge (9 % above €150,000 of adjusted taxable income in classes 1 and 1a). So the effective marginal rate — the one that actually decides your refund — is the band rate plus that surcharge:

That table is the whole argument in one place. The home savings deduction is not one product with one return. It is five different products depending on what you earn.

Worked example: €1,344 a year for ten years

Take someone single, aged 30, whose top band is 39 % — so an effective marginal rate of 41.73 %.

They pay €1,344 into a home savings contract. At tax time they get €560.85 back. So the €1,344 sitting in that account cost them only €783.15 of their own money. Before a single euro of interest, the state has already turned €783.15 into €1,344 — an instant uplift of 71.61 % on the money that actually left their pocket.

Run that for the ten years the contract has to last:

• gross contributions: €13,440
• interest at BHW's guaranteed 0.2 %: €121.61
• balance after ten years: €13,562
• total refunded by the tax office: €5,609
• their own money in: €7,831

They put in €7,831 and finished with €13,562. That is a total return of about 73.17 % on their own money over the decade, and it did not depend on markets at all.

What return would investing have to beat?

Here is the fair comparison, because it is the one that keeps the cost identical. Instead of the home savings contract, the same person invests their own €783.15 a year — the true out-of-pocket cost — and gets no deduction.

To reach the same €13,562 after ten years, that investment has to compound at 11.72 % a year, after tax.

That is a demanding bar, and it is worth two honest observations rather than one.

Over the ten years to 30 June 2026, the MSCI World index returned 13.37 % a year in euro, gross. An investor who had actually held a world equity fund through that decade would have beaten the deduction. But measured over its full euro record, which starts on 31 December 1998, the same index returned 7.85 % a year — and at 7.85 % the investment does not catch up. So the deduction wins against a normal decade and loses against an exceptional one, which is another way of saying the comparison is close enough that the guaranteed side deserves credit for being guaranteed.

One structural point cuts the other way, and it matters in Luxembourg specifically. Guichet.lu is explicit that for a resident private investor a gain on a holding of less than 10 % of a company's capital, sold more than six months after purchase, is exempt; only gains realised inside that six-month speculative window are taxed at the ordinary rates, and even then only above €500 in the calendar year. Investing here is not tax-crippled the way it is in many countries, so the deduction is competing against a comparatively clean alternative rather than a hobbled one.

Why the answer flips depending on what you earn

Now re-run the same maths on a smaller salary. In the 20 % band the effective rate is 21.4 %, so the refund on €1,344 is only €287.62 and your own money in the account is €1,056.38 a year. The pot at the end is unchanged at €13,562 — but because you funded far more of it yourself, the return an investment needs in order to match it collapses to 5.44 % a year.

That is the single most useful thing on this page, and it reverses the usual advice. The home savings deduction is a high-earner's instrument. Therefore, the lower your marginal rate, the weaker the case for locking money up for ten years, because a long-run global equity return has historically cleared 5.44 % more comfortably than it has cleared 11.72 %.

Age does not change this. On the €672 ceiling for the over-40s the refund halves to €280.43 and so does the pot, to €6,781 — but the ratio is identical, so the break-even return stays at 11.72 %. Being over 40 does not make the deal worse per euro. It just makes it smaller.

What about money above the ceiling?

Nothing above the ceiling gets a deduction. That euro earns 0.2 % and nothing else.

Concretely: an extra €1,000 a year, parked in a home savings contract for ten years on top of a maxed-out ceiling, grows to €10,090 — €90 of interest for a decade of being locked up. There is no tax argument for it, because the tax argument stopped at the ceiling. This is the part of the debate where the "just invest it" camp is straightforwardly right, and it is also the most common mistake: people who correctly open a contract then over-fund it.

So the two options are not really rivals. The deduction is a small, capped, well-paid slice at the bottom of your savings, and everything above it is a separate decision — one that belongs with the rest of your purchase budget, which our mortgage and affordability tools are built for.

Does the state savings premium change the answer?

Not in the way most people assume. Luxembourg does pay a prime d'épargne worth 10 % of the increase in your savings each calendar year, capped at €500 a year and €5,000 in total, over a maximum ten-year savings period — but it is reserved for people who qualify for the prime d'accession à la propriété, you must have saved with the same financial institution for at least a year, and you must put at least 90 % of the saved funds into the property within two years of the deed.

Crucially, it is not a home savings product perk. Ordinary bank savings qualify too. So the premium is a reason to save deliberately before buying; it is not a reason to prefer a Bausparvertrag over anything else.

How big is any of this next to an actual Luxembourg home?

This is where the honest answer gets uncomfortable, and where our own data is the relevant evidence.

chathome.lu data shows a median asking price of €711,155 across the 6,472 active apartments listed for sale nationally on 30 July 2026, at a median of 8,300 €/m² — in the same range as the 7,135 €/m² national median implied by the official quarterly price index for 2026-Q1. You can check the current spread yourself on our commune price pages or by browsing apartments for sale; how those figures are built is set out in the price methodology.

Against that:

• ten maxed years for one person under 41 accumulate €13,562, or 1.91 % of that median apartment
• a couple both under 41 accumulate €27,123, or 3.81 %
• the statutory duties alone on that purchase — 6 % registration plus 1 % transcription — come to roughly €49,781, and even the couple's ten-year pot covers only 54.49 % of that

So the deduction is genuinely good money and genuinely small. It is worth taking because the refund is large relative to what you put in, not because it will ever build your deposit. Anyone treating a home savings contract as their plan for buying in Luxembourg is off by an order of magnitude.

What can go wrong

The ten-year rule has teeth. If you cancel the contract inside ten years, or use the money for something that is not a housing purpose, the contributions you already deducted are retroactively treated as non-deductible and the tax office issues a corrective assessment — imposition rectificative — clawing the refunds back. Death and permanent incapacity for work are the recognised exceptions.

That is the real cost of the 71.61 % head start: illiquidity, and a penalty for changing your mind. If there is a meaningful chance you leave Luxembourg, change plans, or need that money for something other than a home in the next decade, the guaranteed part of the deal stops being guaranteed.

One more thing worth knowing before you plan around any of this: several of the temporary housing tax reliefs people still quote from 2024 have since lapsed, which we track separately in what is still active and what has expired. The home savings deduction is not one of the expired ones — it is permanent law, not a package measure.

Two smaller notes. Interest credited on a home savings deposit at an approved caisse d'épargne-logement sits outside the 20 % RELIBI withholding that applies to ordinary Luxembourg savings interest — though at 0.2 % there is very little to tax either way. And when the private pension deduction ceiling rose from €3,200 to €4,500 for 2026, the home savings ceilings were left untouched, so €1,344 and €672 are still the numbers to plan around.