Marie Curie Cancer Care has pledged £2.5m in addition to the government's £1.8m investment in eight end-of-life care pilots announced on Tuesday.
The Department of Health advised it would provide an additional £200,000 to seven adult pilot sites and £400,000 to a children and young persons pilot site, which are all working to collect information on developing a fairer funding system for palliative care across the country.
The pilots are being set up following a recommendation from the independent Palliative Care Funding Review chaired by Tom Hughes-Hallett, outgoing Marie Curie chief executive.
Marie Curie has since advised that it would review the pilot sites and plan where additional funds of £2.5m would best be invested.
"As a leading end of life care provider we want to use our resources to enhance the pilots by testing the wider recommendations of the Palliative Care Funding Review - assessment, case management and co-ordination," Hughes-Hallett said.
"It is these elements that are vital to delivering services that give people the high quality service that they deserve."
A full list of the organisations leading the pilots can be found at the Department for Health website.
In addition to its pilot funding the DoH also announced an annual investment of £10m to support voluntary sector provision of children's hospices and hospice at home care until 2015, when it expects the new funding systems tested by the pilots to be in place. Forty children's hospices are to share the £10m annual funding in the meantime.
The government advises the children's hospice sector has received £57m of grant funding since 2006, £20m of which has been delivered in the past two years.