The singing superstar is playing five gigs during the second UK leg of her record breaking Eras tour with the last concerts tonight and tomorrow night.
Around 450,000 Swifties in total are attending the sell-out shows with many of them from outside the London area or abroad and unable to return home the same night.
The research from data platform Stocklytics the Hilton London Wembley saw the biggest spike with average room rates rising 834% from £111 to £1,329 over the course of a week.
Budget brand Premier Inn had a more modest price increase of 156% from £59.33 to £144, while Holiday Inn prices rose by 126% when Swift was in town.
Travelodge saw the smallest hikes with hotel price increasing by 98%.