# Buying Property with a Partner: Ownership Shares Explained for Tax & Legal Clarity > Understand how ownership shares affect taxes and legal responsibilities when buying property with a partner in Germany. Canonical: https://www.investbud.de/en/blog/buying-house-unmarried-couple-germany Last updated: 2026-10-26 ## Why Ownership Shares Matter When Buying Property Together When you buy property with a partner, the ownership shares in the land register decide how income, costs and the property are divided, including if you separate. A 50-50 split does not always match what each partner paid. Ownership shares determine how you split profits, losses, and tax deductions like AfA depreciation. For example, if you own 60% of a property priced at EUR 300,000, your tax-relevant expenses and rental income must be declared proportionally. ## How Ownership Shares Impact Your Tax Calculation The German tax system requires you to report rental income and expenses based on your ownership percentage. Suppose the property generates a rental yield of 4.2% on EUR 300,000 purchase price; the gross annual rent would be EUR 12,600. If your ownership share is 40%, your taxable rental income is EUR 5,040. Similarly, deductible expenses such as mortgage interest, maintenance costs, and AfA depreciation are split according to ownership shares. AfA applies only to the building's share of the cost, at 2% a year for buildings completed 1925 to 2022 (§ 7 (4) [EStG](https://www.gesetze-im-internet.de/estg/__7.html)). With an 80% building share (our analysis default), AfA on EUR 300,000 is EUR 4,800 a year; a 40% owner claims EUR 1,920. ### Example Calculation with Ownership Shares Purchase price: EUR 300,000 Ownership shares: Partner A 60%, Partner B 40% Annual rent (assumed 4.2% yield): EUR 12,600 Rental income Partner A: EUR 7,560; Partner B: EUR 5,040 AfA depreciation (2% of an assumed EUR 240,000 building share): EUR 4,800 total; Partner A claims EUR 2,880, Partner B EUR 1,920 Mortgage interest and other expenses are divided similarly. ## Legal Framework for Co-Ownership: What You Need to Know in 2025/2026 Couples can buy as co-owners by fractional shares (Miteigentum nach Bruchteilen, §§ 741 ff., 1008 [BGB](https://www.gesetze-im-internet.de/bgb/__1008.html)). The Land Register (Grundbuch) records each share (§ 47 GBO). Each of you can sell your own share; the whole property only together (§ 747 BGB). If you separate, either partner can demand dissolution at any time (§ 749 BGB); without an agreement, the property is auctioned by the court and the proceeds divided (§ 753 BGB, § 180 ZVG). Unmarried partners have no statutory inheritance right, because § 1931 BGB covers only spouses, so without a will the deceased partner's share goes to their relatives. A partner who inherits by will falls into tax class III with a EUR 20,000 allowance and a 30% rate on taxable amounts up to EUR 6 million (§§ 15, 16, 19 [ErbStG](https://www.gesetze-im-internet.de/erbstg_1974/__16.html)). Grunderwerbsteuer (property transfer tax) is due on the purchase price, as for any other buyer. Unmarried partners get no exemption for later transfers between them: § 3 No. 4 [GrEStG](https://www.gesetze-im-internet.de/grestg_1983/__3.html) exempts only spouses and registered civil partners. When selling or transferring shares, keep the Spekulationsfrist in mind: a gain on a rented property sold within 10 years is taxed as income (§ 23 EStG). ## Optimizing Ownership Shares for Tax Efficiency and Legal Security One strategy is to align ownership shares with each partner's financial contribution to clarify liability. For example, if Partner A finances 70% and Partner B 30%, setting ownership shares accordingly reduces disputes and aligns tax deductions fairly. Another approach is to create a co-ownership agreement detailing responsibilities for maintenance costs, mortgage payments, and income distribution, preventing misunderstandings and facilitating clear tax declarations. Keep in mind that the Mietpreisbremse caps the rent on new leases in designated areas (§ 556d BGB), so your planning should use realistic rental yield projections. Use the [rental yield calculator](https://www.investbud.de/en/calculators/rental-yield) to estimate returns. ## Common Tax Declaration Mistakes to Avoid When Co-Owning Property A frequent error is declaring rental income and expenses without respecting ownership shares, which the tax office will correct. Always split income and costs according to your registered shares. Another mistake is neglecting to claim your proportional share of AfA depreciation, which reduces taxable income significantly over time. Failing to account for mortgage interest separately for each owner can also cause discrepancies. If you both sign the loan, the bank can claim the full amount from either of you (§ 421 BGB). Use a [mortgage calculator](https://www.investbud.de/en/calculators/mortgage) to see the interest share. Lastly, some partners forget to include ancillary purchase costs like notary fees and Grunderwerbsteuer in their property tax basis, which can affect depreciation calculations. The [closing costs calculator](https://www.investbud.de/en/calculators/closing-costs) can help estimate these expenses. ## Frequently Asked Questions ### Can ownership shares be changed after buying a property together? Yes, with a notarised transfer (§ 311b BGB) and a new Land Register entry. Between unmarried partners a paid transfer triggers Grunderwerbsteuer; a gift is exempt from it (§ 3 No. 2 GrEStG) but falls under gift tax. ### How does the Spekulationsfrist affect co-owners when selling a property? The Spekulationsfrist is a 10-year period during which capital gains from selling property are taxable. Each co-owner’s tax liability depends on their ownership share, so selling before 10 years can result in proportional capital gains tax. ### Is it better to have equal or unequal ownership shares? It depends on your financial contributions. Equal shares simplify the split of income and expenses; unequal shares can reflect what each of you actually paid in. ### How should rental income be declared for tax purposes with multiple owners? Each owner must declare their rental income proportionate to their ownership share. For example, if you own 40%, report 40% of the gross rent and claim 40% of deductible expenses. ### Are there legal risks in co-owning property without a written agreement? Yes, without a co-ownership agreement, disputes over expenses, income distribution, and decision-making can arise. A written contract clarifies responsibilities and helps avoid costly conflicts. Calculate your rental yield, mortgage, and cash flow for a co-owned property with Investbud calculators. This article is not tax, legal or investment advice. ## Related - [German Real Estate Blog: Guides & Insights](https://www.investbud.de/en/blog)