The ordination of women priests will cost the Church of England more than £26 million in payouts to clergy who have left in protest, according to official figures.
The size of the final bill will dismay many in the Church, which is facing severe financial difficulties and the prospect of dioceses being made bankrupt.
The figures will also refuel the heated debate on whether the Church should allow the consecration of women as bishops, a reform which could trigger another exodus of clergy.
The millions of pounds have been paid out as part of a scheme agreed in 1992 as a conciliatory gesture to the hundreds of traditionalist clergy who threatened to split the Church over women priests.
Under the scheme, clergy who resigned for reasons of conscience before the cut-off date for lodging claims, which falls later this month, would receive hardship payments to help them after they left their jobs.
Many of them became Roman Catholic or Orthodox priests, but a number have since returned to the Church of England.
The Church Commissioners said that, up until the end of 2003, 430 clergy had resigned and applied for the payments, and a further nine have resigned so far this year. Forward in Faith, the traditionalist umbrella group, said that it did not expect a last-minute exodus before the official final date, Feb 21.
The Church Commissioners said that the estimate for the total cost up to the end of 2014, when it expects the scheme to have run its course, was now approximately £26 million.
In 2002 the commissioners predicted that the final total would not exceed £23 million for 400 departing clergy, so the new figure will disappoint bishops who are being forced to axe clergy posts.
Stephen Parkinson, the director of Forward in Faith, said the true number of clergy who have resigned is nearer 600, but many did not qualify for the compensation package so were not officially registered.
"This shows that the Church has lost hugely both financially and in terms of talent over women priests," he said. "No one has calculated how many lay people left, taking their wallets with them."
Christina Rees, the chair of Watch, a group campaigning for women bishops, said: "Most people who support women clergy are shocked and horrified by the amounts paid out."
A service to mark the tenth anniversary of the ordination of women is being held in St Paul's Cathedral tomorrow and a series of other events are to be held around the country later this year.