Rent vs. Buy: The Honest Calculation

Buying property makes financial sense only when four conditions are met: price-to-annual-rent ratio under 20, 10+ years living horizon, 20-30% down payment, and reserve fund after purchase. In most large German cities, the first condition fails — the price-to-rent ratio is 25-40 annual rent payments (2025) [1].

Psychological Dimension

The desire to buy an apartment after relocation is understandable: you want stability after a period of uncertainty. But in Germany, rental protection is legally stronger than in many countries of origin — evicting a tenant is extremely difficult [2]. The urgency feels acute, but the decision should be made considering the German context, not origin-country experience.

Kaufnebenkosten: Transaction Costs 7-15%

Kaufnebenkosten (additional costs when buying) are mandatory payments on top of the property price. They amount to 7-15% of the cost and are not recovered when selling [3].

Cost	Typical Amount	Note
Grunderwerbsteuer (transfer tax)	3.5-6.5%	Depends on federal state [4]
Notary	~1.5%	Legally required
Grundbuch (land registry)	~0.5%	Property registration
Maklerprovision (agent commission)	0-7.14%	Not always applicable [5]
Total transaction costs	7-15%	One-time at purchase
Annual maintenance	1-2% of value	Repairs, Hausgeld, taxes [6]

Example: When buying a €400,000 apartment in Berlin (Grunderwerbsteuer 6%), transaction costs will be €40,000-50,000. This amount disappears at the moment of purchase — if you sell at the same price, you're down by this amount.

Price-to-Rent Ratio: Key Indicator

The price-to-rent ratio shows how many annual rent payments the property costs. Formula: purchase price ÷ annual rent of comparable housing [7].

Ratio	Interpretation
Under 20 annual rents	Buying may make economic sense
20-25 annual rents	Gray zone, depends on mortgage rate
Over 25 annual rents	Renting often better from NPV perspective

Rate context: 10-year fixed mortgages average 3.93%, top offers 3.6-3.7%, 15-year fixed around 4.15% (June 2026) [12].

Reality of German cities: In good locations in Munich and Frankfurt, this ratio is 30-40; in Berlin, 25-32 (2025) [1][8]. This means that when buying for €400,000, comparable rent would be €10,000-16,000 per year (€830-1,330/month). At this ratio, a renter investing the difference often accumulates more capital over 10-15 years.

Criteria for Buying: Four Mandatory Conditions

Buying makes economic sense only when all four conditions are met simultaneously:

Criterion	Threshold	Why Important
Living horizon	10+ years	Transaction costs only pay off with long ownership
Down payment	20-30% of cost	Avoid PMI, get better rate, reduce underwater mortgage risk
Debt-to-income ratio	Payment under 35% of net income	Financial stability if job loss occurs [9]
Reserve fund	6-12 months expenses remain after purchase	Cover unexpected repairs, Hausgeld

Phase appropriateness: Buying property is a Ladder phase decision (year 2+), not Boat. In Boat phase, the priority is capital resilience, not optimizing ownership vs renting.

German Context: Why Renting Works

In Germany, the homeownership rate is 47% (2024) — the lowest in the EU [10]. This is not a sign of poverty, but the result of a functioning tenant protection system:

• Kündigungsschutz (eviction protection) — owner cannot evict without valid reasons
• Mietpreisbremse (rent control) — in tight markets, new-contract rents may not exceed the local comparable rent by more than 10%; extended until the end of 2029 [11]
• Long-term contracts — renting for 10-20 years in one apartment is common

This is structurally different from many countries of origin, where tenants are defenseless against landlords.

Honest Calculation

Both paths — renting with investing the difference and buying — can create capital. The result depends on math (price-to-rent ratio, mortgage rate, price growth), not emotions. In German cities with high price-to-rent ratios, renters often accumulate more over 15 years.

FAQ

This is not legal or financial advice.

What is the Kaufpreisfaktor and what counts as expensive?

The Kaufpreisfaktor (price-to-rent ratio) is the purchase price divided by the annual cold rent of comparable housing. Rule of thumb: under 20 is relatively affordable, over 25 is expensive [13]. In large cities the factor is 25-38 (2025): good locations in Munich and Frankfurt reach 30-40, Berlin 25-32 [1][8]. The reciprocal is the gross rental yield: a factor of 25 means 4%, a factor of 33 about 3%.

How many years do I need to stay for buying to pay off?

A reasonable benchmark is 10-15 years of stable residence [13]. The reason: transaction costs of 7-15% vanish at the moment of purchase. With house prices rising 2.3% per year (Q1 2026) [15], merely recovering the Kaufnebenkosten takes several years — on top of that come the forgone return on your capital, interest to the bank, and maintenance. A horizon under 5 years almost always favors renting [13]. The exact break-even depends on the price-to-rent ratio, the mortgage rate, and rent growth — there is no universal number.

Does the Mietpreisbremse change the math in favor of renting?

Partially, yes. The Mietpreisbremse (rent control) caps new-contract rents in tight markets at no more than 10% above the local comparable rent (ortsübliche Vergleichsmiete); it has been extended until the end of 2029 [11]. Exceptions: new buildings and comprehensively modernized apartments. For the rent-plus-invest versus buy calculation, slower rent growth strengthens the renting side. But it is not a freeze: new-contract rents in Germany rose 3.0% year-on-year (Q1 2026) [15].

What happens if I buy and then leave Germany in 5 years?

This is the high-loss scenario. Kaufnebenkosten of 7-15% are not recovered. Ending the mortgage early when selling triggers the Vorfälligkeitsentschädigung (compensation to the bank for lost interest) — roughly 5-10% of the remaining debt, depending on the balance, remaining term, and rate level [14]. Profit from a sale within 10 years is subject to income tax unless you lived in the property yourself in the year of sale and the two preceding years. The alternative — renting it out from abroad — is possible, but German tax obligations and the operational management remain.

Rates went from 1% to almost 4% — does buying still make sense?

Current rates: 10-year fixed averages 3.93%, top offers 3.6-3.7%, 15-year around 4.15% (June 2026) [12]. Rule of thumb: each percentage point of interest is roughly €200 per month on a €240,000 loan. The 1% rates of 2021 were the exception; today's level is closer to the long-term norm. Buying has not automatically lost its point — but the test via price-to-rent ratio and living horizon has become stricter: at a factor above 25 and rates near 4%, renting and investing the difference more often wins mathematically.

Sources

1. Homeday (2026). "Vervielfältiger: Kaufpreisfaktor berechnen". https://www.homeday.de/de/immobilienbewertung/vervielfaeltiger-kaufpreisfaktor/

2. Bürgerliches Gesetzbuch (BGB), § 573 "Ordentliche Kündigung des Vermieters". https://www.gesetze-im-internet.de/bgb/__573.html

3. Immobilienverband Deutschland IVD (2024). "Kaufnebenkosten beim Immobilienerwerb". https://ivd.net/ratgeber/kaufnebenkosten

4. Bundesministerium der Finanzen (2024). "Grunderwerbsteuer nach Bundesländern". https://www.bundesfinanzministerium.de/

5. Gesetz über die Verteilung der Maklerkosten (2020). "Bestellerprinzip bei Wohnimmobilien". https://www.bmj.de/

6. Stiftung Warentest (2023). "Nebenkosten beim Eigenheim: Mit diesen Kosten müssen Sie rechnen". Finanztest 11/2023.

7. Deutsche Bundesbank (2023). "Preis-Miet-Verhältnisse in deutschen Städten". Monatsbericht Oktober 2023.

8. Baufi24 (2025). "Mietrenditeatlas H2 2025 — Bruttomietrenditen deutscher Großstädte". https://www.cash-online.de/a/wo-sich-vermietung-noch-lohnt-blick-in-den-baufi24-mietrenditeatlas-712148/

9. Verbraucherzentrale (2024). "Baufinanzierung: So viel Kredit können Sie sich leisten". https://www.verbraucherzentrale.de/wissen/geld-versicherungen/kredit-schulden-insolvenz/baufinanzierung

10. Eurostat (2026). "68% of people living in EU households own their home" (2024 data). https://ec.europa.eu/eurostat/web/products-eurostat-news/w/ddn-20260205-1

11. § 556d BGB (Mietpreisbremse), https://www.gesetze-im-internet.de/bgb/__556d.html; extension until 31 Dec 2029: Deutscher Bundestag (2025), https://www.bundestag.de/dokumente/textarchiv/2025/kw26-de-mietpreisbremse-1084786

12. Dr. Klein (June 2026). "Aktuelle Bauzinsen". https://www.drklein.de/aktuelle-bauzinsen.html

13. Finanztip (as of 2026). "Mieten oder kaufen: Was lohnt sich für Dich?". https://www.finanztip.de/baufinanzierung/mieten-oder-kaufen/

14. Finanztip (as of 2026). "Vorfälligkeitsentschädigung bei Hausverkauf". https://www.finanztip.de/baufinanzierung/vorfaelligkeitsentschaedigung/

15. vdpResearch (Q1 2026). "Immobilienpreise steigen zu Jahresbeginn 2026 weiter". https://www.vdpresearch.de/immobilienpreise-steigen-zu-jahresbeginn-2026-weiter/