A quarter of wealthy grandparents say they are helping to fund their grandchild's education so that they can pay less inheritance tax.

Wealth planner Rathbones surveyed more than 1,000 wealthy parents and grandparents who were already helping to fund school or university education, or planned to do so.

Of the grandparents, a quarter said tax planning was a 'major factor' in their decision to help pay school or university costs.

More than two-thirds said inheritance tax considerations influenced their decision to some degree.

One in five grandparents who already provide support say they cover most or all university costs, including 7 per cent who fund virtually the entire expense of higher education.