The deadline for entering the awards, run by Third Sector and the Institute of Fundraising, is 11 March.
There are 15 categories, including the best corporate challenge team, the most outstanding partnership between a charity and a business, and the best cause-related marketing project.
There is also the Business Charity Champion category for the business leader who has done the most to harness corporate support for the voluntary sector.
Experts from the voluntary and corporate sectors will judge the entries and the winners will be announced at a black-tie dinner in central London on 29 June.
The headline sponsor of the awards is Mandate Communications, and the Charities Aid Foundation is also supporting the event.
- For further details about the awards, visit www.businesscharityawards.com.