According to the latest study, the average British adult only gets into bed at 11.04pm on a weeknight, which is more than 15 minutes later than this time last year.
A year ago the typical Brit went to bed at 10.47pm.
According to the study of 3,000 people, a quarter of adults now do not climb into bed until midnight and one in ten are still awake at 1am.
Almost half said they were getting into bed later than ever before, with two thirds saying they struggled to fit everything in after a long day at work.
More than 61 per cent said they ended up falling asleep on the sofa because they were so exhausted at the end of the day.
However, the poll revealed that even when we do finally get to bed, 79 per cent of Brits find it hard to get to sleep.
Over a quarter say the main reason they have trouble nodding off is because they are worrying about financial issues and relationship problems.
More than a quarter toss and turn because they are too hot or cold and 26 per cent struggle to get some shuteye because they are stressed about their job.
Half say their lack of sleep has an effect on the quality of their work, with 53 per cent of those saying they find it hard to concentrate on their job.
And 48 per cent of people have little or no motivation and 35 per cent feel irritable and moody.
More than 39 per cent of people argue with their partner because they are so tired.
A spokesperson for nocturnal cramp treatment Crampex, which carried out the survey, said: ''Hectic lifestyles and long working hours means Brits are now going to bed later than ever before.''
''Trying to unwind at the end of the day can be difficult when you feel pressure to do chores in the home, cook dinner, exercise or catch up with loved ones,'' Telegraph quoted the rep, as saying.
''Making time to fit everything in can prove difficult and getting to bed late can become inevitable. When you do get to bed, quality sleep is essential to ensure you feel regenerated and ready for the day ahead.
''Interruptions caused by emotional or health problems can be very detrimental to everyday life, making it harder to concentrate at work and maintain a positive attitude,'' the rep added.