Saving systematically toward a home purchase
When you buy a home, equity is no minor detail. It is the lever that decides the interest rate, the monthly payment and the security of your entire financing. Plan it calmly and with foresight, and you do not buy faster, but you buy on firmer ground.
For most households a property is the single largest decision of their financial life. It ties a long-term loan to an asset that cannot be sold on a whim. That is precisely why it pays, before the question “which property?”, to ask the quieter one: how much equity does this decision rest on?
This article puts the common rules of thumb in context, shows what the purchase-related costs are made of, and sets out ways to build equity patiently. Every figure here is a planning anchor with its own conditions, never a promise.
Kernaussagen
At the heart of it sit two amounts that are often confused. One is the equity that flows into the purchase price and so lowers the loan amount. The other is the Kaufnebenkosten (Germany purchase-related transaction costs), the fees and taxes that arise around the purchase and create no matching value in the property. Both need to be financed, and each carries its own rule of thumb.
A widely cited guide from consumer portals such as Finanztip runs as follows: cover the purchase-related costs entirely from equity, and beyond that bring ideally around 20 percent of the purchase price. This is no law and no bank requirement, but a heuristic. It lowers the loan amount, usually improves the terms, and creates a buffer should the property value sit below the purchase price for a time. Whether more or less makes sense in your case depends on income, the interest-rate environment and your plans for life.
In Germany the purchase-related costs typically add up to around 9 to 12 percent of the purchase price. Finanztip gives “about 10 percent” as a rough guide; in individual cases it can run higher. They are made up of three building blocks.
| Cost component | Order of magnitude | Note |
|---|---|---|
| Grunderwerbsteuer (Germany real-estate transfer tax) | 3.5 to 6.5 percent | Depends on the federal state: Bavaria 3.5 percent (the lowest rate), up to 6.5 percent in states such as North Rhine-Westphalia, Brandenburg, Saarland, Schleswig-Holstein. |
| Notar (notary) and Grundbuch (land register) | around 1.5 to 2 percent | Set by statute (GNotKG), broadly uniform nationwide. |
| Maklerprovision (estate-agent commission, where applicable) | buyer share often around 3.57 percent incl. VAT | Since 23.12.2020 the statutory equal-split rule (Halbteilungsgrundsatz, §§ 656c and 656d BGB) applies when a flat or single-family house is sold to a consumer: the buyer bears at most half. Market-dependent, not always present. |
The spread on the Grunderwerbsteuer is considerable and depends solely on the federal state: between 3.5 percent in Bavaria and 6.5 percent in several states there is, on a purchase price of EUR 400,000, a difference of around EUR 12,000. Because the rates are set by the states, they can change; check the current rate for your federal state.
Banks usually finance only the purchase price, not the purchase-related costs. These must therefore be raised from equity. Overlook this and you are planning with a financing gap the size of the entire purchase-related costs.
Every euro of equity is a euro you pay no interest on, and a euro less risk for the bank. That is exactly what the terms reflect: the higher the equity share, the lower the Beleihungsauslauf (loan-to-value ratio) and the more likely the offered rate sits at the lower edge. The overview below shows the direction of the relationship, not specific figures.
| Equity share | Interest advantage | Monthly payment | Risk |
|---|---|---|---|
| 10% | None (surcharge possible) | Very high | High |
| 20% | More favourable terms | Medium | Moderate |
| 30%+ | Best terms | Low | Low |
At the lower end of this scale sit full and over-financing. A 100 percent financing covers the purchase price; a 110 percent financing additionally covers the purchase-related costs. Both exist in the market, neither is fundamentally wrong, but both come at a price. Banks have the higher risk paid for through an interest surcharge, and without an equity buffer the financing reacts more sensitively to swings in the property value and to your own income risk. A structure like this therefore calls for a stable, well-plannable income and should be understood as a deliberate exception, not as the standard route.
How you build equity depends above all on one quantity: the time horizon until the planned purchase. The nearer the goal, the more it matters that the money is reliably available; the further off it lies, the more room there is for a more broadly diversified investment.
Money that will be needed in a few years should not depend on the market’s mood of the day.
For a short horizon of about one to three years, planning certainty is the first criterion. Tagesgeld (instant-access savings) stays available day to day; Festgeld (fixed-term deposit) locks the amount up for a set term. Neither is built for return, but for ensuring that the saved amount stands ready in full and reliably at the time of purchase. The interest achievable here is market-dependent and tracks the ECB rate environment; it is no reliable building block of return.
For a longer horizon, a broadly diversified ETF savings plan comes into consideration as an option. Over many years a globally diversified equity portfolio can allow higher gains than interest-bearing deposits, though at the price of fluctuations and without any guarantee. Returns in the capital market are assumptions, never promises.
Money firmly earmarked for the property purchase within the next few years does not, by the prevailing view, belong in equities or equity ETFs: a market low can fall exactly on the purchase date and shrink the available amount. The nearer the purchase comes, the more there is to be said for shifting what has already been saved into safe, available holdings.
The choice is therefore less a question of “better or worse” than a question of time horizon and risk appetite. There is no blanket recommendation; what matters is that the form of investment fits the moment at which the equity is actually needed.
How much you have to set aside each month follows from three quantities: the equity goal, the time horizon and the assumed rate of interest. The calculator below brings these together and shows which savings rate makes your goal reachable, by way of example.
Nebenkosten
EUR 42.245,00EK benötigt (20% + NK)
EUR 112.245,00The idea behind the calculation
Equity goal = (purchase-related costs) + (around 20 percent of the purchase price)
The savings rate shown is a model calculation based on your inputs and an assumed rate of interest, not a forecast. Change the purchase price, the time frame or the interest-rate environment, and the required rate shifts with it.
For building equity and a property there are government programmes, and they change a great deal over the years. The most relevant at present is the KfW support “Wohneigentum für Familien” (home ownership for families, WEF, KfW programmes 300 for new builds and 301 for existing properties): a low-interest loan, not a grant, tied to an income limit of EUR 90,000 in taxable household income plus EUR 10,000 per further child, as well as to the Effizienzhaus-40 standard. Added to this is Wohn-Riester (residential pension, Eigenheimrente, § 92a EStG), under which Riester credit can be put toward an owner-occupied property. Always check the programmes and conditions in force at the time.
The context matters: the former Baukindergeld (a per-child building grant) was not a regional but a nationwide programme (KfW 424), and it has expired. The application window closed on 31.12.2022; new applications are no longer possible. Anyone still coming across the Baukindergeld on outdated advice pages should therefore no longer factor it into their planning.
Government support can make building equity and the financing easier, but it is tied to conditions and is not an investment recommendation. Whether a programme fits your situation depends on income, household size and building project, and should be settled before the purchase.
How long the path to equity takes is determined in essence by two adjustment screws: the size of the goal and the monthly savings rate. The more ambitious the goal and the lower the rate, the longer the period, and the other way round.
A worked train of thought illustrates the principle without being a forecast. Suppose a household needs a total of EUR 60,000 for purchase-related costs and around 20 percent equity. At a monthly savings rate of EUR 1,000 and leaving interest aside, that would, on the arithmetic alone, come to five years (EUR 60,000 divided by EUR 12,000 per year). An assumed rate of interest would shorten this period; a lower rate would lengthen it.
Illustrative back-of-the-envelope calculation
Years (without interest) = equity goal ÷ (monthly savings rate × 12)
This back-of-the-envelope calculation is deliberately kept simple and illustrative, no promise. Above all it shows one thing: the savings rate is the lever you hold in your own hand. Whoever wants to shorten the period can raise the rate, adjust the goal modestly, or combine the two.
Kernaussagen
The calculations in this article are illustrative and not a forecast. This text explains general principles around equity and property financing and is not individual investment, tax or financing advice. Support conditions, tax rates and interest rates can change.
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