ImmoZahl
What a property actually carries — worked out before anyone signs.
60 calculators for private landlords, buyers and owner-occupiers: yield, purchase costs, tax and tenancy law — each with its working and its source.
What it does
Buying or letting a flat means committing to sums that have to hold for two decades — usually decided by a rule of thumb and a gut feeling. ImmoZahl starts there: 60 calculators each answer one concrete question, from rental yield through purchase costs by federal state to depreciation. Of these, 23 weigh two options against each other — buy or rent, renovate or sell, privately or through a company — and both sides are computed after tax. For 10,635 municipalities local data is added, and 96 terms are explained in the glossary. Every result shows its working; every legal statement names its source. All calculation happens in the browser: purchase prices, rents and loan terms never leave the device. Free, no sign-up, six pages also in English.
- 60 calculators for yield, tax, tenancy law and location
- 23 of them compare two options side by side — both after tax
- Local data for 10,635 municipalities, plus 96 terms in the glossary
- Everything computed in the browser — no input leaves the device
A taste
Four of 96 technical terms — verbatim
Taken from the glossary, unchanged. This is how it sounds there when a term gets explained that nobody else explains.
- FachwortCashflowWas am Monatsende übrig bleibt: Miete minus Darlehensrate, laufende Kosten und Steuer.
- FachwortBreak-evenDer Punkt, an dem eine Rechnung kippt: das Jahr, ab dem der Cashflow positiv wird, oder der Mietpreis, ab dem sich ein Objekt trägt.
- FachwortDisagioEin Abschlag bei der Auszahlung: Ausgezahlt wird weniger als der Nennbetrag, verzinst und getilgt wird der volle.
- FachwortBereitstellungszinsenDas Entgelt dafür, dass die Bank ein zugesagtes Darlehen bereithält, solange es noch nicht abgerufen ist.
Straight in
If you already know what you are looking for in ImmoZahl
It fits you if
- You face a specific number — yield, purchase costs, depreciation — and want to see the arithmetic, not just the result
- You are weighing two paths against each other: buy or rent, refurbish or sell, privately or through a company
- Your prices, rents and loan terms should not leave your device — everything is computed in the browser
It does not fit if
- You need binding advice: the calculators replace neither a tax adviser nor a lawyer; they show the calculation and where the rule comes from
- You are looking for properties or listings — this computes, it does not broker
- You expect an app with an account and saved projects: there is no sign-up, and nothing is stored on a server
Both lists are here because a product that fits everyone was made for no one.
How it is built
The way it is built, written down
What is inside ImmoZahl is not only a promise here — it is described, with reasons and with what it costs.
Calculating rental yield: gross, net and the price-to-rent factor
Gross yield is in every listing and says little. How to get from it to net yield, what the price-to-rent factor means — and which items are forgotten most often. With a worked example.
Read the articleA privacy statement that does not fall behind the code
Almost every privacy statement is accurate on the day it is written and never again. The reason is not ill will but a missing connection — and that connection can be made.
Read the articleWhen a number means something — and when it is noise
A small website produces small numbers, and small numbers vary on their own. Read like large ones, they turn chance into a trend. How to tell the difference.
Read the articleCommon questions
What visitors want to know before the first click.
Where are my figures processed?
In the browser, on your device. Purchase price, rent and loan terms are not transmitted and not stored anywhere.
Where do the tax and tenancy figures come from?
Every legal statement names its source — the section and reference sit next to the result, so any figure can be looked up.
What do the comparison calculators do?
23 of the 60 put two paths side by side and run both over the same period — after tax, because a comparison before tax regularly gives the wrong answer. The difference then appears as an amount rather than a feeling.
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