With effect from November 18th, customers will also be able to take out an extra £1 million business protection on top of their personal cover.
Bonnie Burns, protection product marketing director for the UK's leading provider, said the move was Legal & General's way of meeting the needs of today's families and businesses and responding to the changing trends that underpin the market.
"People are taking out larger mortgages and they require greater flexibility in terms of the amount of cover they need," explained Ms Burns.
"We believe that there is huge potential to help businesses better protect their key assets - their people - and increasing the maximum sum assured reflects our commitment to this market," the Legal & General representative added.
Another leading insurer, Norwich Union, recently introduced plans to extend children's critical illness cover to all of its policies.
Having introduced the cover as a standard inclusion from August 2003, it provides a benefit of £10,000 or 50 per cent of the sum assured - whichever is lower - for each child on the adult's policy.
At Direct Life we aim to ensure that all of our clients get the best deal possible when purchasing their life insurance, term life assurance, mortgage protection and critical illness life insurance policies online.