Charities Germany Environment co2online gGmbH
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co2online gGmbH

Berlin Reg R003308 · Vereinsregister Sign up to see website
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44
Integrity Assessment
Partial transparency
44/100 · methodology

About co2online gGmbH

As a non-profit consulting company based in Berlin, co2online has been committed to energy efficiency and climate protection since 2003. With target group-specific information campaigns, online-based consulting services (e.g. interactive energy savings checks, energy savings account), practical tests and competitions, co2online motivates us to use energy resources more efficiently, use climate protection technologies and deal with climate change issues in everyday life. The impulses for action that co2online triggers are proven to contribute to the CO2 reduction. In recent years co2online has carried out more than 15 million individual consultations and thus initiated the prevention of more than 8.8 million tons of CO2 emissions. For the purpose of the representation of interests, discussions are conducted with representatives of the German …

Als gemeinnützige Beratungsgesellschaft mit Sitz in Berlin engagiert sich co2online seit 2003 für Energieeffizienz und Klimaschutz. Mit zielgruppenspe­zifischen Informationskampagnen, onlinebasierten Beratungsangeboten (z. B. interaktive EnergiesparChecks, Energiesparkonto), Praxistests und Wettbewerben motiviert co2online dazu, Energieressourcen effizienter zu nutzen, Klimaschutztec­hnologien einzusetzen und sich im Alltag mit Klimaschutzthemen, den Folgen des Klimawandels zu beschäftigen. Die Handlungsimpulse, die co2online auslöst, tragen nachweislich zur CO2-Minderung bei. In den vergangenen Jahren hat co2online mehr als 15 Millionen Einzelberatungen durchgeführt und damit die Vermeidung von mehr als 8,8 Millionen Tonnen CO2-Emissionen angestoßen. Zum Zwecke der Interessenvertretung werden Gespräche mit Abgeordneten des Deutschen Bundestages sowie Vertreter*innen der Bundesministerien geführt. Inhalt dieser Gespräche sind die Erläuterungen von Änderungsnotwe­ndigkeiten hinsichtlich der deutschen Gebäude- und Energieeffizie­nzpolitik, die im Hinblick auf die notwendige …

Translated from German by GiveRadar.

Founded
Headquarters
Berlin
Size
micro

Focus areas & reach

· What they work on and where
🌿 Environment
Cause tags

How it stacks up against peers

· vs. 8 similar environment in Germany
Integrity Assessment This charity: 44
Peer average: 56

Red flags

· All clear
Tax-authority revocation
OFAC / EU / UN sanctions
Open investigations
Governance scandals
Related-party deals
Excessive exec comp

Common questions

· Auto-generated from filings + methodology

co2online gGmbH is a registered environment nonprofit based in Berlin, Germany. It is registered with the German Vereinsregister (Association Register). It was founded in 2003 and has been operating for 23 years. Its registration number is R003308. It has a GiveRadar Integrity Assessment of 44/100 (Partial transparency), indicating some public data is available but key signals are missing. This is below the average of 56/100 for environment charities in Germany. The organization reports €5K in annual revenue.

co2online gGmbH has a GiveRadar Integrity Assessment of 44/100. This score combines five components: Registration (20 pts), Financial Transparency (30 pts), Governance (20 pts), Contact Availability (10 pts), and Data Recency (20 pts), with negative adjustments for any red flags. A score of 44 ('Partial transparency') means some public data is on file but key signals are missing - worth a closer look before donating. For comparison, the average integrity assessment for environment charities in Germany is 56/100.

co2online gGmbH is located in Berlin, Germany. The organization was established in 2003 and has been active for 23 years.

Based on official tax filings, co2online gGmbH has €5K in annual revenue. Its revenue is below the peer average of €489K. Create a free GiveRadar account to view the complete financial breakdown with year-over-year trends.

co2online gGmbH is classified as a Environment organization, registered in Germany. By size, it is categorized as a micro organization. It has €5K in annual revenue.

co2online gGmbH has a GiveRadar Integrity Assessment of 44/100. We recommend reviewing the full profile before making a donation decision. The organization is overseen by the local Amtsgericht (district court). You can donate directly through their official donation page linked on their GiveRadar profile. GiveRadar provides data for research purposes and does not endorse any organization. Always do your own due diligence.

As a non-profit consulting company based in Berlin, co2online has been committed to energy efficiency and climate protection since 2003. With target group-specific information campaigns, online-based consulting services (e.g. interactive energy savings checks, energy savings account), practical tests and competitions, co2online motivates us to use energy resources more efficiently, use climate protection technologies and deal with climate change issues in everyday life. The impulses for action that co2online triggers are proven to contribute to the CO2 reduction. In recent years co2online has carried out more than 15 million individual consultations and thus initiated the prevention of more than 8.8 million tons of CO2 emissions. For the purpose of the representation... co2online gGmbH is classified as a environment organization registered in Germany. The organization was founded in 2003.

Among environment charities registered in Germany: co2online gGmbH's GiveRadar Integrity Assessment of 44/100 is below the peer average of 56/100. Its annual revenue of €5K is below the peer average of €489K.

co2online gGmbH is a registered nonprofit in Germany. Donations to recognized charitable organizations (gemeinnuetzige Organisationen) are tax-deductible up to 20% of your total income. You will need a donation receipt (Zuwendungsbestaetigung) from the organization for your tax return.

You can verify co2online gGmbH's charitable status in several ways. First, check the Zuwendungsempfaengerregister (ZER) at https://www.bzst.de/DE/Unternehmen/Zuwendungsempfaengerregister_organisation/zuwendungsempfaengerregister_organisation_node.html - the BZSt maintains this federal register of all organisations eligible to receive tax-deductible donations in Germany. Second, you can look up the association in the Vereinsregister (association register) at the local Amtsgericht (district court) via https://www.handelsregister.de/ - this confirms the legal form, registered address, and board members. Third, check whether the organisation holds the Freistellungsbescheid (tax-exemption notice) from its local Finanzamt - the notice is re-issued every three years and confirms the 'gemeinnuetzig' status under the Abgabenordnung. Legitimate charities publish this on their website or provide it on request.

You can donate to co2online gGmbH directly through its donation page (https://www.co2online.de/spenden/?mtm_campaign=meta-menu-link&mtm_kwd=spenden&mtm_source=co2online). German charities typically accept SEPA bank transfer (Ueberweisung) to the organisation's IBAN, SEPA direct debit (Lastschrift/Einzugsermaechtigung) for recurring donations, PayPal, credit card payments, and online payment processors like Stripe or Mollie. Many German charities use platforms like betterplace.org, GoFundMe, or their own Spendenseite (donation page). International donors can give via SEPA transfer (Germany is in the eurozone) or PayPal. For your donation to be tax-deductible, you need a Zuwendungsbestaetigung (donation receipt) from the organisation - for amounts up to 300 euros, a bank statement showing the transfer is sufficient.

Verified against 3 official sources, last refreshed .

Annual revenue
Under €10K
Source: Bundestag Lobbyregister why this matters
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Taxes

Tax-deductibility for donors

German donations are deductible if co2online gGmbH holds a Freistellungsbescheid (recognition as a charitable purpose) and issues a Zuwendungsbestätigung receipt.

Always confirm tax treatment with the charity directly or your tax advisor before donating.

Leadership

TA
Tanja Loitz
Managing Director

Latest news

From global news sources

10 articles found

From global news sources

Sentiment

Neutral

Activity timeline

Filings and press mentions, merged

Heizen mit Gas wieder deutlich teurer - IVV immobilien vermieten & verwalten
Oct 2025
www.vermieter-ratgeber.de
Kostenfalle Gasheizung: Warum Heizen mit Gas immer teurer wird - HaustechnikDialog
Mar 2025
www.haustechnikdialog.de
Betriebskosten in Deutschland steigen um 5 Prozent / 2022 rund 100 Euro mehr für ... - Presseportal
Jan 2024
www.presseportal.de
Heizkosten 2022 um bis zu 81 Prozent gestiegen / Heizspiegel für Deutschland zu ... - Presseportal
Sep 2023
www.presseportal.de
Warmwasserkosten senken: Haushalte können durchschnittlich 90 Euro pro Jahr sparen / ... - Presseportal
Jun 2023
www.presseportal.de
Ab 1. März neue Labels für Haushaltsgeräte: Effizienz-Skala von A bis G / ... - Presseportal
Feb 2021
www.presseportal.de
Neuer Heizspiegel für Deutschland: Heizkosten steigen / 720 Euro pro Jahr bei ... - Presseportal
Oct 2020
www.presseportal.de
So vermeiden Verbraucher am meisten CO2 / Beispiele für wirksamen Klimaschutz / ... - Presseportal
Sep 2019
www.presseportal.de
Schimmel im Haus macht krank - Tester für automatische Wohnraumlüftung gesucht / ... - Presseportal
May 2018
www.presseportal.de
10 Jahre Energiesparmeister-Wettbewerb: Deutschlands beste Klimaschutz-Projekte an ... - Presseportal
Jan 2018
www.presseportal.de

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Peer charities

Other environment in Germany, by integrity assessment

Sources and verification

Refreshed

Registration and legal identity
Bundesanzeiger (German Federal Gazette)
Financial filings
Bundesanzeiger annual disclosures
News and media coverage
GDELT Project + Google News

Data freshness

Last updated
Apr 21, 2026
Profile completeness
60%

What we don't know

Honest gaps - our score reflects transparency, not impact

Mission statement
No self-published statement of purpose
Programs & projects
No named programs listed by the charity
Tax-deductibility status
Whether donations are tax-deductible has not been verified
Operating reach
Countries where programs run not specified

Methodology

GiveRadar combines public registry filings, ProPublica Nonprofit Explorer, Charity Navigator, GuideStar, and news archives into a single 0-100 integrity assessment. We don't take a cut of any donation, ever.

Read full methodology

Quick facts about co2online gGmbH

What is co2online gGmbH?
co2online gGmbH is a environment nonprofit organization based in Berlin, Germany. As a non-profit consulting company based in Berlin, co2online has been committed to energy efficiency and climate protection since 2003. With target group-specific information campaigns, online-based consulting services (e.g. interactive energy savings checks, energy savings account), practical tests and competitions, co2online motivates us to use energy resources more efficiently, use climate protection technologies and deal with climate change issues in everyday life. The impulses for action that co2online triggers are proven to contribute to the CO2 reduction. In recent years co2online has carried out more than 15 million individual consultations and thus initiated the prevention of more than 8.8 million tons of CO2 emissions. For the purpose of the representation of interests, discussions are conducted with representatives of the German Bundestag and representatives of the Federal Ministries. The purpose of these discussions is to provide the view of the committed homeowners and to give impulses for the German building and energy efficiency policy, which are in view of the necessary heat and energy transition in Germany and thus for the objectives of the non-profit organization of the Federal Republic of Germany to be discussed regularly and to be discussed by representatives of the German Bundestag.
When was co2online gGmbH founded?
co2online gGmbH was founded in 2003.
Who leads co2online gGmbH?
Tanja Loitz serves as Managing Director.
Where is co2online gGmbH located?
Headquartered in Berlin, Germany.
What is co2online gGmbH's annual budget?
Annual revenue is approximately Under €10K.
Is co2online gGmbH trustworthy?
co2online gGmbH has a GiveRadar Integrity Assessment of 44 out of 100 (Partial transparency). The score reflects public-data transparency: registration, financial disclosure, governance, contact details, and how recently data was refreshed. It does not measure program impact.
What is co2online gGmbH's registration number?
Registration: R003308 (Germany).
What is co2online gGmbH's website?
https://www.co2online.de
Are donations to co2online gGmbH tax-deductible?
Donations may be tax-deductible for residents of Germany under local rules. US donors should check whether the charity has an equivalency-determination letter or a US-based fiscal sponsor before claiming a deduction.