Filling this year's Panini World Cup sticker book costs £773.60, twice the cost for Euro 2016, according to maths expert Prof Paul Harper.
The pages contain 32 squads of players, plus managers, stadiums and World Cup legends, totalling 682 stickers.
A pack of five stickers has risen from 50p to 80p - a 60% increase.
If you buy 137 packets and never get the same sticker twice, it will cost £109.60, but this is "extremely unlikely", says the professor.
Prof Harper, from Cardiff University's School of Mathematics, worked out a formula to include the least probable number of duplicate stickers.
In the end, he demonstrated that on average you would need to buy 4,832 stickers - or 967 packets - to complete the Italian-made book.
One cost-saving measure is swapping stickers between friends, but even with that tactic, filling the album would be expensive.
With 10 friends swapping, it could still cost them an average of £247 each to complete the album, according to the professor's calculations.
In 2016, he made the same calculations for the 680-space Euro sticker book. It was £374, meaning the cost has more than doubled.