It suggests families in the UK spend a total of £7.7bn a year on education expenses such as school uniform, lunches and sports kit.
The Norwich Union School Sums survey published on Friday says a child's state school education from the age of five to 16 will cost parents a total of £9,515.
This is made up of 22 school trips, 44 shirts or blouses, 33 pairs of trousers or skirts, 22 jumpers and 22 pairs of shoes.
Average cost per child per year
School lunches for 36 weeks £324
Clothes/shoes £178
Transport for 36 weeks £108
Books £31
School trips £84
Sports kit £57
After-school clubs £45
Extras £38
Over the 11 years, Britain as a whole would therefore spend £84bn on youngsters' school requirements, the report suggests.
Norwich Union's Ian Beggs said: "Many parents think of state schools as being free but the costs are significant.
"Nearly £8bn of our money gets spent every year just covering the everyday costs of sending our children to school - that's nearly £900 per child.
"It's important to allow for these costs when managing your finances.
"If parents do their school sums now they'll know what they need to put aside."
Spending by city - per child per year
London £1,058
Birmingham £919
Cardiff £852
Glasgow £843
Manchester £827
The survey was conducted by market researchers Brand And Issues, who interviewed 500 parents in London, Birmingham, Manchester, Cardiff and Glasgow.
Parents were asked the average cost of each of a selection of school-related items and the number of times they bought them each year.
Secondary schoolchildren were found to cost £60 per child per year more, largely due to higher uniform and school trip prices.
Last month, a report by the National Association of Citizens Advice Bureaux (NACAB) said many children from low income families were being excluded from school because they did not have the correct uniform.
This was largely down to the steady erosion of grants to help poorer parents afford the required school clothes for their children, it added.