Heating Cost Billing Providers Compared: Options & Costs

When it comes to heating cost billing, housing companies choose between traditional metering service providers and digital platform providers, with property management software that includes a billing module as a third option. Costs range from roughly €50 to over €150 per residential unit per year, depending on the level of automation and how devices are provided. Anyone comparing offers should also keep an eye on data quality and contract terms.

For you as a landlord or housing company, this choice is no longer a mere formality right now. By the end of 2026, the German Heating Costs Ordinance requires remotely readable, interoperable metering technology in every residential unit, and the CO₂ Cost Allocation Act has been shifting part of the heating costs onto your side as the property owner since 2023. Both ultimately hinge on the provider you choose for billing. So the price per unit alone shouldn't be the deciding factor.

In practice, the choice usually comes down to three questions. How much automation do you really need? How long are you willing to commit? And does the provider already cover the new statutory deadlines?

What types of providers offer heating cost billing?

Germany's market today has three types of providers for heating cost billing, and they work quite differently, both technically and commercially. The traditional metering service provider owns its own fleet of devices and handles installation and meter reading itself, usually delivering the billing statement as well. Digital platform providers such as KUGU, with the KUGU Messdienstplattform and the AbSys billing system, rely instead on automated data collection and open interfaces, while affiliated metering services handle the device fleet and on-site readings. Property management software, in turn, builds a billing module directly into the property management solution and processes the data supplied by a separately contracted metering service.

The advantage of the traditional metering service provider lies in its established nationwide coverage and reliable on-site service, especially for technically complex existing buildings. The disadvantage shows up in market structure and competition: in 2014, the two largest nationwide providers together held more than 50 percent market share, according to a sector inquiry by the German Federal Cartel Office, with the top five holding over 70 percent. Alongside them, an estimated 200 to 300 mostly regional metering service providers are active, which makes the overall market fairly hard to navigate.

Digital platform providers stand out for automation, open interfaces and short contract terms. Your portfolio should already be somewhat digitally prepared, though, or switching won't bring much benefit. Property management software with a billing module works best where you're already running a central management solution and would rather add a module than operate another separate system. For pure consumption measurement, a metering service is still needed in the background; the module simply processes its data further.

What does heating cost billing cost per unit per year?

Pure meter reading and billing costs currently mostly range between €50 and €100 per unit per year, excluding device rental, depending on unit size and the number of devices installed. As a historical reference point, the German Federal Cartel Office used an average of around €74 per unit for 2014; the range has shifted noticeably since then. Device rental comes on top: heat cost allocators typically cost €6 to €15 per device per year, while a heat meter runs considerably higher, at €40 to €80 per unit.

Watch out for flat-rate offers: One digital provider advertises an all-inclusive flat rate of around €150 per unit per year. That includes installation and device provisioning. Maintenance, data transmission and the billing itself are included as well. This figure isn't directly comparable to pure meter reading costs of €50 to €100, because additional services are already priced in. Ask every provider exactly which items are covered by the flat rate before comparing prices.

How much meter reading services can weigh on the overall utility bill was illustrated in 2019 by a study from the now-discontinued Marktwächter Energie, a consumer advocacy watchdog: at around a quarter of the households examined at the time, metering and reading services alone accounted for more than 15 percent of total heating costs. A simple calculation shows how quickly this adds up: for an apartment building with 20 units, pure meter reading costs of €50 to €100 per unit alone already come to €1,000 to €2,000 in annual billing costs, with device rental on top.

How do contract terms and provider switching differ?

Large traditional metering service providers typically require contract terms of five to ten years, while owner-run, regional or digital providers usually offer one to three years or annual cancellation. The German Federal Cartel Office itself cites an average effective contract commitment of around ten years for large providers as a concrete barrier to competition. Once you commit to a provider with a long contract term, you're tied to its pricing and service approach for just as long.

Switching providers is technically getting easier: since December 1, 2022, newly installed or retrofitted remotely readable metering devices must be interoperable across manufacturers and connectable to a smart meter gateway. This requirement in the Heating Costs Ordinance stems directly from recommendations by the Federal Cartel Office and is meant to make switching providers possible without replacing the entire device fleet. For your portfolio, that means the closer you are to replacing non-remotely-readable technology anyway, the more it pays to compare providers before your next contract renewal.

What difference does a digital metering platform like KUGU AbSys make?

A digital metering platform gives you continuously automated consumption data that you can evaluate mid-year, not just once annually. You see consumption spread out across the year, well before the actual annual statement. KUGU positions itself deliberately as a platform provider: the company supplies the software and analyzes the data, while affiliated metering services handle the on-site readings. Through the KUGU Messdienstplattform with the AbSys billing system, metering service providers and property managers combine their consumption data and billing workflows in one system, complemented by middleware for exchanging data with third-party systems. According to the company's own figures, more than 500,000 residential units run through it every year.

Automation also affects consumption itself: a pilot project by the German Energy Agency (dena) puts the effect of monthly consumption information at around ten percent in savings compared with a purely annual statement. This feedback to users only works if consumption data flows continuously and automatically, which is exactly what a digital platform delivers through its ongoing data collection. How granular consumption and emissions data can also be used for ESG reporting is covered in the article on ESG data in real estate.

For portfolios with many properties, there's a second effect: across hundreds of buildings, automated data collection runs far more smoothly than the old model of manual readings and individual technician call-outs. Measured values also improve the data basis for investment decisions, as described in the article on CO₂ monitoring in buildings. Housing companies already planning to digitize their boiler rooms, as described in the article on digitizing the boiler room, often combine that step directly with switching billing platforms.

What do the amended Heating Costs Ordinance and the CO₂ Cost Allocation Act require of providers?

Landlords must upgrade or replace existing, non-remotely-readable heat cost allocators and water or heat meters with remotely readable, interoperable technology by December 31, 2026, at the latest. This is based on the amended Heating Costs Ordinance, in force since December 1, 2021. From January 1, 2027, non-remotely-readable metering technology will no longer be permitted, and tenants will then be entitled to reduce their heating costs by 3 to 15 percent. Any provider you choose now should already fully cover this deadline, rather than catching up shortly before it expires.

CO₂ cost allocation as an ongoing obligation: Since January 1, 2023, the CO₂ Cost Allocation Act has applied, dividing a building's CO₂ costs between you as the landlord and your tenants through a ten-tier model. With a very good energy rating, such as the EH-55 standard, tenants bear the full CO₂ costs; with a poor rating, you as the landlord take on a high share. Your billing needs to reflect this tiered logic correctly, and not every billing system does that automatically.

The CO2KostAufG itself has since been expanded: the Building Modernization Act, passed in July 2026, adds further operating costs arising from mandatory climate-neutral fuels and grid fees. Going forward, such costs are also meant to no longer be fully passed on to tenants. How this plays out in detail for recoverable operating costs is explained well in Haufe's analysis of CO₂ cost allocation. A billing system that automatically keeps pace with these tiered models and legal changes saves you a manual recalculation every time the rules change.

Which provider type fits your portfolio?

The deadline of December 31, 2026 effectively forces every portfolio to address its metering technology anyway, regardless of which provider you use today. That's exactly the moment to rethink the entire billing setup, not just swap out devices. A switch you're making anyway costs barely more than a pure device upgrade, yet opens the door to automated data collection and shorter contract terms.

For smaller portfolios with a handful of technically simple buildings, a traditional, regionally rooted metering service provider with a short contract term can still be the most practical choice. But once your portfolio grows across many properties and you need ongoing transparency for tenants and regulators, the traditional approach reaches its limits. If you also want CO₂ cost allocation handled cleanly and automatically, a digital metering platform such as the KUGU Messdienstplattform with AbSys gets noticeably more value out of your data. In concrete terms: check well before your next contract renewal which of your properties will need to be upgraded to remotely readable technology in 2026 anyway. From that point on, traditional and digital providers can be compared fairly, side by side.

How much does heating cost billing cost for an apartment building with 20 units?

Around €1,000 to €2,000 per year in pure meter reading costs, based on €50 to €100 per unit across 20 units. Device rental comes on top separately, depending on the number of heat cost allocators and heat meters per unit. With all-inclusive models from digital providers, the total can run higher, though installation and maintenance are usually already included.

Can I switch metering service providers during the contract term?

No, during an ongoing contract term of five to ten years, as is typical with large traditional providers, a switch is usually only possible once the contract ends. Digital and regional providers with terms of one to three years or annual cancellation offer noticeably more flexibility here. Since the interoperability requirement for new metering devices took effect, switching has also become technically easier, because existing devices don't necessarily need to be replaced entirely.

Do all heat cost allocators need to be replaced by 2026?

Only devices that can't be read remotely need to be upgraded or replaced by December 31, 2026; technology that's already remotely readable and interoperable isn't affected by the deadline. From January 1, 2027, operating purely manually read devices will no longer be permitted, and anyone who misses the deadline risks tenants exercising their right to reduce heating costs by 3 to 15 percent.

Who bears the CO₂ costs in heating cost billing?

That depends on the building's energy performance. Landlords and tenants split the CO₂ costs through a ten-tier model in which the landlord's share increases with the building's specific CO₂ emissions per square meter. In highly energy-efficient buildings, such as the EH-55 standard, tenants bear the full CO₂ costs, while in poorly renovated buildings, landlords take on the largest share.

Why do digital providers advertise higher flat rates than traditional metering service providers?

The €150 figure isn't a pure meter reading price. With some digital providers, it already includes installation and ongoing device maintenance, while pure meter reading costs without these extra services usually range between €50 and €100. So check exactly what's included in the flat rate with every offer.