One question, six different purchase systems
Renting and buying cannot be compared by placing today’s rent beside today’s mortgage payment. A buyer commits capital to the deposit, taxes and transaction costs, then builds equity while carrying ownership costs. A renter can invest the same starting capital and any monthly saving. This article makes those two end positions comparable.
The common scenario holds the property value, equivalent rent, financing share, mortgage rate, horizon and growth assumptions constant. Each local model keeps its own selected purchase-cost treatment and established mortgage convention. The result therefore shows how those modelled systems change the same planning example; it does not rank national housing markets.
| Held constant | Varies locally | Not compared |
|---|---|---|
| EUR-equivalent price and rent | Purchase taxes and transaction costs | Local incomes and affordability |
| Financing share and mortgage rate | Mortgage term convention and selected owner costs | Forecast market prices or rents |
| Growth and investment assumptions | Selected sale-cost assumptions | Quality, tenure security and mobility |
Build the shared scenario
Every underlined value updates the applicable local models and all connected comparison cards, sheets and timelines.
The six answers
The same scenario can produce different answers because upfront costs and recurring ownership assumptions change the capital available to each side.
| Market and selected local scenario | Buying wealth | Renting wealth | Buying advantage | First buyer lead |
|---|
Inspect one market through time
Select a market to see the connected starting capital, initial monthly buyer cost and year-by-year wealth comparison. The first year and final year are always included; longer horizons use a compact milestone set.
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| Year | Buying wealth | Renting wealth | Buying advantage |
|---|
Why the answers diverge
High transaction costs make short holding periods harder for buying because the renter invests cash that the buyer pays away. Mortgage amortisation, rent growth and property appreciation can later reverse that gap. A larger assumed investment return strengthens the renter’s portfolio, while a higher mortgage rate raises the buyer’s early monthly cost and changes debt reduction.
Country labels are shorthand for explicit examples, not national averages: Bavaria for Germany, Madrid resale for Spain, an Italian prima casa purchase using prezzo-valore, an England/Northern Ireland home mover, entered Polish transaction costs equal to 3% of price, and the stated US tax and closing assumptions. Open the local pages to replace those assumptions with the actual property and transaction.
How the comparison is calculated
Each renter begins with the same cash the corresponding buyer commits at purchase. Every month, the side with the lower housing cost invests the difference. At each year-end the buyer’s position is the property value less sale costs and remaining mortgage debt, plus any invested monthly savings. The renter’s position is the invested starting capital plus monthly contributions and return.
Visible results are converted back to euros for comparison, but each non-euro model calculates in its local currency first. Changing an exchange rate therefore changes the local nominal price and rent together; it does not simulate currency gains or losses during the holding period.
- Poland Ministry of Finance — PCC rates · KNF — mortgage-rate risk
- GOV.UK — residential SDLT rates
- US CFPB — buying a home and loan costs
- Deutsches Notarinstitut — transfer-tax information · GNotKG
- Spain Agencia Tributaria · Banco de España — mortgage guidance
- Agenzia delle Entrate — buying a home · Banca d’Italia — mortgages
- European Central Bank — euro reference exchange rates
Frequently asked questions
Does the market with the largest buying advantage have the best housing market?
No. It only has the largest result for this common price, rent and assumption set. Local wages, actual property prices, credit access, housing quality, taxation outside the model and personal preferences are not ranked.
Why use the same starting capital for the renter?
The deposit and purchase costs are cash the renter does not spend on buying. Investing the same amount creates a common starting point and makes the opportunity cost visible.
Why is France not included?
MMDAI does not yet have a validated French rent-vs-buy model. This page connects existing local models rather than inventing a French result inside the comparison.
Are the exchange rates live?
No. They are editable conversion assumptions. Replace them with a rate suitable for the date and purpose of your comparison.
Does a positive result mean I should buy?
No. It is a modelled wealth difference, not advice. Liquidity, mobility, maintenance risk, financing eligibility, tenure security and the value you place on each option remain personal.