Thousands of grandparents are missing out on valuable National Insurance credits, says the Telegraph. The "specified adult childcare credit" is designed to protect the pensions of grandparents who retire early to care for grandchildren so that their parents can go back to work. If you miss a whole year of NI contributions, this results in a cut of £231 a year in the state pension, and the credit can avoid this. But since the credit was introduced in 2011, just 5,000 people have claimed it, though over 100,000 could be eligible.