Research saves lives.

For over 20 years BIG has been conducting clinical trials that have already changed the way women and men are treated for breast cancer around the world, such as these.
International breast cancer research requires many resources to develop new treatments and even cures for people with the disease.

Your donation can help improve the lives of even more people with breast cancer by supporting these studies.

1. My donation

One-time donation


Monthly gift

Your tax reduction

Donations greater than or equal to € 40 per year are tax-deductible for residents in Belgium.
You will receive this certificate automatically in the course of the following year. The tax deduction is 45% of the amount of your donation.
For example: if you donate 40 € to BIG against breast cancer you get 18 € and only pay 22 €.

Do you prefer to make a classic bank transfer?
Our IBAN number is BE08 0689 0916 0213. 
If you donate from another country and want to know if this donation can be tax deductible, contact us!

2. My details

* Required Fields (this information is mandatory to issue your tax receipt)

How will your privacy be respected?

The personal data collected by BIG through this form is required to send your tax receipt to you. 

In accordance with the General Data Protection Regulation (GDPR) (EU) 2016/679, BIG hereby informs you that you may exercise at anytime your right of access, rectification, restriction, objection, data portability and your right to erasure regarding your personal data collected by BIG. 

To exercise the rights above, please contact us on following address:
BIG Data Protection Officer
Breast International Group
Rue de Bretagne/ Bretagnestraat 20
B-1200 Brussels
Tel + 32 2 486 16 00
To know more about how BIG processes personal data, please read our Privacy Policy.

3. My payment

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How will your donation be used?

The donations BIG receives are spent on BIG’s own breast cancer research. When supporting BIG, you are part of practice-changing research and initiatives.

Between 2012 and 2020, BIG received over € 132 696 663*, of which 94.4% was spent directly on research conducted under the BIG umbrella, making a huge difference in the lives of women and men with breast cancer. 

The Breast International Group is proud to adhere to the Code of Ethics of the VEF-AERF

*funding for study collaborations involving pharmaceutical and other partners, as well as from the philanthropic work of BIG against breast cancer