Charities are being urged to vote for the politician that has done most to help their cause.
Third Sector is teaming up with website ePolitix for this year's Charity Champions awards, which rewards MPs and Lords that have responded best to campaigns.
Seven parliamentarians will be honoured at an awards ceremony in December for their work with animal welfare, children and youth, disability, the environment, health, international affairs and older people. There will also be a lifetime achievement award.
Last year's winners included Chancellor Gordon Brown for his contribution to children's charities.
"We had a cross-section of winners from different parties and from both houses," said Robin Hutchinson, managing director of Parliamentary Communications, which owns ePolitix.