Germany & Montenegro: Avoiding Double Taxation on Property (2026)

One of the first worries German residents raise when buying in Montenegro is simple: will I be taxed twice — once in Montenegro and again at home? It’s a fair concern, because as a German tax resident your worldwide income generally remains reportable in Germany even when the property sits abroad. The reassuring part is that relief from double taxation generally still works in practice — though, as you’ll see, the precise treaty position between the two countries is itself a debated point, which is exactly why planning early matters.

First, the treaty question itself is not clear-cut

It’s tempting to assume there’s a simple, current tax treaty between Germany and Montenegro that settles everything. In reality the position is debated: whether the older agreement inherited from the former Yugoslavia still applies to Montenegro is not something to take for granted. This uncertainty is precisely why you shouldn’t rely on a blanket assumption about a treaty — and why German residents with a Montenegrin property are well advised to get tax advice on their specific situation rather than a rule of thumb. The good news is that relief from being fully taxed twice doesn’t depend solely on that one question, because Germany’s own domestic rules also provide mechanisms to relieve foreign tax.

Why the question comes up at all

Germany taxes its residents on worldwide income, so rental income or a gain from a Montenegrin property doesn’t simply disappear from the German picture because it was earned abroad. At the same time, Montenegro taxes income arising from property located on its territory. Without a relief mechanism, the same euro of rental income could be exposed to tax in both countries. Relief is what prevents that — but relief is not the same as exemption, and it doesn’t happen automatically without correct reporting.

The general principle: property is taxed where it sits

Across international tax practice, income from immovable property is typically taxed first in the country where the property is located. For a Montenegrin apartment, that means Montenegro has the primary right to tax the rental income and any gain on sale. Germany then relieves the foreign tax so the income isn’t taxed in full a second time — generally either by crediting the tax already paid in Montenegro against the German liability, or by exempting the foreign income while still counting it when setting your German tax rate (the progression effect). Which mechanism applies, and exactly how, is a question for a German tax adviser on your specific situation — but the underlying logic is consistent: you don’t pay the full tax twice over.

What gets taxed in Montenegro

For the Montenegrin side, the figures that matter are the ones that apply to any owner. Rental income is taxable, but the headline rate isn’t applied to your full rent — Montenegro applies deemed deductions before tax, with more favourable treatment for tourism rentals than for general residential letting, so the effective rate is lower than the nominal figure suggests. A gain on selling the property is taxed at a flat capital-gains rate. These are the amounts that feed into the relief calculation on the German side, which is exactly why keeping clean records of what you paid in Montenegro matters: that documentation is what supports your relief claim back home.

Why you should plan before you buy

The mistake is treating tax as an after-the-fact formality. With the treaty position itself unsettled, the interaction between Montenegrin tax and German relief shapes your real net return — and it’s far easier to structure correctly from the start than to untangle later. Keep records of Montenegrin tax paid, understand that you’ll still have German reporting obligations, and get advice specific to your circumstances. The relief framework is there to protect you from double taxation; using it correctly is a matter of planning and paperwork.