A career-long commute is likely to set a worker back an average of £50,000, according to a survey.
For a Londoner starting work at 18 and finishing at 65, the cost of commuting could reach as high as £66,000, the poll by investing service Nutmeg.com found.
Overall, commuters will spend an average of 10,634 hours travelling to and from work in their lifetime - the equivalent of 443 days.
The survey found that the length, and cost, of a commute was highest in London with those travelling to or in the capital spending more than 13,000 hours commuting in a lifetime.
The daily time spent commuting to and from London is one hour 14 minutes, with travel costing £118 on average.
In contrast, the Liverpool commute is only 42 minutes and costs £72 a month on average, with Liverpudlian workers only notching up 7,532 hours of travel in a lifetime.
Althpough Glasgow commuters travel for longer a day (52 minutes) than those in Liverpool, Glaswegians have the least-expensive commute - at £63 a month or £35,500 in a lifetime.
Of commuters surveyed, 20% said they did so because it was too expensive to buy or rent closer to their workplace. While 51% of Londoners reckoned the cost of travel was too expensive, the happiest commuters appeared to be in Birmingham, with only 25% of them complaining about the expense.
Other bugbears were the length of the journey, overcrowding on trains, music-playing fellow travellers and commuters taking up too much seat room.
A spokesman for rail industry body the Rail Delivery Group said: "On average, people travel just over 10,000 miles a year on an annual season ticket with the average price of a journey around £5 or 24p per mile, which can be half the equivalent of commuting by car."