Property & Housing

Understanding property purchasing with financing, additional costs and property taxes

The guide combines financing, additional purchase costs and ongoing real estate costs into a practical overall view.

Updated on Apr 21, 2026 Topic: Mortgage, purchase costs, rental yield, property tax

Buying real estate is more than just the purchase price

Anyone who buys a property often first looks at the purchase price. But that's not enough for the actual load. The following are also crucial:

  • Additional purchasing costs
  • Financing and fixed interest rates
  • ongoing costs such as property tax
  • If rented, also return and rental deposit

What which computer is intended for

computer Key question
Construction financing calculator How high is the monthly payment and how does the remaining debt develop?
Additional costs calculator What do I have to pay in addition to the purchase price?
Rental yield calculator How does the property act as an investment?
Rental deposit calculator How high can the deposit be when renting?
Property tax calculator Roughly what current tax burden can be expected?

Clarify additional purchase costs first

Many financing options fail not because of the purchase price, but because of the additional costs. If real estate transfer tax, notary, land register and broker are not properly planned, a large amount of equity is quickly missing.

That's why it's worth taking a look Additional costs calculator usually before the first financing discussion.

Classify construction financing realistically

A low monthly rate seems pleasant at first. What is also crucial is how high the remaining debt is after ten or fifteen years. This is exactly where it helps Construction financing calculator: You not only see the current burden, but also how strong the repayment is.

Only consider returns net

For rented properties, the gross return is only the first step. The net return is more meaningful because it includes additional purchase costs and ongoing, non-allocable costs.

The Rental yield calculator shows both perspectives side by side.

Don't underestimate property tax

Property tax is not a one-time cost item, but rather an ongoing cost item. For landlords it is often apportionable, but for owner-occupiers it remains a relevant component of ongoing housing costs.

With the Property tax calculator the federal model can be comprehensibly summarized.

Conclusion

If you want to classify real estate costs clearly, you need several perspectives: purchase price, additional costs, financing and ongoing charges. This is exactly why Ultra-Rechner's real estate calculators have a modular design.

FAQ

Frequently asked questions on this topic

Is a mortgage calculator alone enough?

No. Additional purchase costs, property tax and ongoing property costs should always be taken into account.

Why are additional costs so important?

Because they often have to be paid for from equity and quickly increase the financing gap.

What is rental yield useful for?

It helps to classify whether a rented property is economical in relation to price and costs.

Matching calculators

Continue calculating

Rental deposit calculator

Rental deposit, installment payment and interest income are calculated in accordance with Section 551 of the German Civil Code (BGB).

Property tax calculator

Calculate property tax according to the federal model roughly from the property tax value, measurement number and assessment rate.