XL Capital will offer up to $500m of capacity for comprehensive commercial property insurance packages.
XL insurance chief executive Clive Tobin said the increase in capacity would enable the company to compete selectively for entire insurance programmes on a global basis.
The $500m capacity would only apply where the company was able to provide an entire programme of insurance, according to XL chief underwriting officer for global property Robert Klepper.
"Where we are unable to bind an entire programme, for example co-insuring with another carrier, we will not be offering our full capacity of $500m," said Klepper.
"In these situations, our existing $250m maximum capacity will continue to apply."