Prince William and Kate Middleton with Prince George
Prince William and Kate Middleton show Prince George, their son, to the world for first time Reuters

Kate, the Duchess of Cambridge, will get a 10% "loyalty" discount for giving birth a second time at the Lindo Wing of St Mary's Hospital in London, it has been revealed.

If all goes to plan, Kate, the wife of Prince William, hopes to have her baby at the same hospital where Prince George was born in 2013.

This time the 33-year-old royal will be given 10% off the wing's huge fees thanks to a discount for returning mothers offered by the private hospital group, according to the Daily Mail.

However, prices have increased since their last visit when George was delivered on July 22 2013.

A suite of two rooms now costs £6,570 ($9,700) for a one-night stay with normal delivery – £5,913 with Kate's discount – plus consultant fees of about £6,000.

Prince George
Prince George is expecting a new brother or a sister AFP / Getty Images

That means the cost of even a natural delivery, with little in the way of complications, will easily top £12,000 - with added costs if the use of forceps or other equipment is required.

Last time the Duchess stayed just one night in the hospital, but if she wishes to stay longer it will cost her an extra £2,300.

The new little prince or princess is due on 25 April 25,k and the Duchess herself has said the baby is due 'mid to late April', meaning that he or she could arrive on the Cambridge's wedding anniversary – 29 April – or the 89th birthday of its great-grandmother, the Queen, on 21 April.

Other significant dates coming up include 23 April 23, which is St George's Day.