Selling an investment property: process, tax and the right buyers

Prospective buyers of investment property focus on rental income, operating costs, location and financing. Careful preparation makes these factors transparent and helps suitable investors assess the opportunity. This guide explains the main stages of the sale process.

This guide takes you through the entire sale of an investment property in 2026: the ten steps from preparation to notarisation, the tax pitfalls around the ten-year speculation period, pricing via the yield rather than the price per square metre – and the decisive question of how to reach the buyers who can finance reliably in today’s rate environment.

Why selling an investment asset follows its own rules

With an owner-occupied home, emotion counts; with an investment property, the calculation does. Your buyer is a private investor, a family office or an institutional investor – and all three assess your asset by the same key figures: sustainable net cold rent, deferred maintenance, lease structure, remaining useful life and location. To them the asking price is not a starting point for feelings but a claim they test against their own yield calculation.

From this follows the most important point for preparation: it is not the finest description that sells but the most robust set of figures. Cleanly documented rental income, comprehensible operating costs and a realistic maintenance assumption are worth hard cash when selling an investment property – they shorten the buyer’s review and remove their arguments for a price discount.

Selling an investment property: the process in ten steps

A structured process protects against the two most expensive mistakes – going to market too early with incomplete documents, and remaining visibly unsold for too long. The route looks like this:

1. Clarify the objective and the timeframe. Are you selling to reallocate, to create liquidity or to settle an estate? The reason determines how much discretion and speed you need.
2. Assemble the documents in full. Land register extract, cadastral map, leases, tenant schedule with contracted and actual rent, service charge statements, declaration of division, owners’ meeting minutes, energy performance certificate, records of maintenance and modernisation.
3. Determine the sustainable rent. The basis is not the current rent but the net cold rent achievable in the long run – including vacancy and rent default risk.
4. Determine value via the yield. The purchase price multiplier and the net initial yield set the frame within which professional buyers calculate (see What is my apartment building worth?).
5. Check the tax position. Clarify the speculation period, depreciation and possible commercial classification – ideally with your tax adviser before the contract is finalised.
6. Choose the marketing route. A public portal or a discreet, targeted approach to matching investors? For investment assets, the off-market sale is usually the better choice.
7. Qualify the buyers. Check investment criteria, equity and financing status before reserving – this prevents notarisations from falling through.
8. Negotiate. Price, handover date, liability for defects, treatment of existing tenancies and maintenance reserves.
9. Notarisation before the notary. The purchase contract is notarised; the priority notice of conveyance and the conditions for payment protect both sides.
10. Handover and tenancies. Deposits, current contracts and statements pass to the buyer in an orderly way – “sale does not break lease” (section 566 BGB) remains intact.

Tax when selling an investment property

Tax often decides more money than the final round of price negotiation. Three points you should know before you sell:

The ten-year speculation period

If you sell a let property held privately within ten years of purchase, the gain is taxable as a private disposal transaction (section 23 EStG) at your personal income tax rate. Once the ten years have elapsed, the sale is generally tax-free. Unlike an owner-occupied home, the exemption for own use does not apply to a let investment asset.

Depreciation increases the taxable gain

The depreciation (AfA) claimed over the years reduces the acquisition cost for tax purposes. On a sale within the speculation period, the taxable gain is therefore higher than the plain difference between purchase and sale price would suggest – an effect many owners underestimate.

The three-property rule

Anyone disposing of more than three properties within roughly five years may be classified by the tax office as a commercial property trader – with trade tax and without the tax exemption after ten years. If you are winding down a larger portfolio, plan the order and timing of the sales with tax in mind.

What is my investment property worth?

The value of an investment asset does not follow from the neighbourhood’s price per square metre but from its income. Two key figures speak the language of professional buyers:

• Purchase price multiplier: Purchase price divided by the annual net cold rent. A multiplier of 20 means that the purchase price equals twenty times the annual rent.
• Gross yield: Annual net cold rent divided by the purchase price – the reciprocal of the multiplier. A multiplier of 20 equals a gross yield of 5 per cent.

In the current rate environment, what matters is the relationship between the achievable yield and the buyer’s financing costs. As long as mortgage rates are around four per cent, investors demand a corresponding yield spread – which pushes sustainable multipliers below those of the low-rate years. How interest rates, Bunds and inflation interact is explained in Why mortgage rates are rising. How to derive the value of an apartment building in concrete terms is shown in this article.

Finding the right buyer – the real lever

The more expensive financing becomes, the more often purchases fail at the bank at the last minute. For sellers, the question “who is buying?” therefore becomes as important as “at what price?”. The most reliable purchasers are equity-strong private investors, family offices and institutional investors with a clearly defined acquisition profile – they calculate with today’s terms instead of hoping for the rates they would like.

Reaching exactly these buyers through a public portal is laborious and rarely discreet. The targeted, confidential route is the better one: STRATON matches your asset against the current acquisition profiles of vetted investors – by region, asset class and volume. Within a few days you learn which buyers are currently looking for exactly your asset, without your property ever becoming publicly visible. How this matching works is shown under Process.

Frequently asked questions about selling an investment property

Can I sell a let flat with the tenant in place?

Yes. Under the principle “sale does not break lease” (section 566 BGB) the tenancy passes to the buyer unchanged. For investors a solvent, long-standing tenant is even an advantage – vacant space would first have to be re-let.

Do I need an agent?

Legally, no. When selling an investment property, however, it is less about reach than about access to the right investors with secure financing – and about discretion. A specialised adviser with their own investor network reaches these buyers more precisely than a public listing.

How long does a sale take?

From a complete set of documents to notarisation, a few weeks to a few months is realistic for a well-prepared asset with targeted buyer contact. Incomplete documents and an excessive asking price are the most common causes of long marketing periods.

Is it worth waiting for falling interest rates?

Whether to sell now or later depends on your objectives, the property and your financial circumstances. Future interest rates and sale prices cannot be reliably predicted. An up-to-date valuation provides a basis for this decision.