Quit21After the first yearWhat changes from year 1 to year 10
By Yevhenii, who smoked for 26 years · Updated 9 Nov 2026 · 5 min readGet the page for your day in the app, every morning.
The day by day pages stop at one year, because after that nothing changes from one week to the next. The years still count. This page goes through years one to ten with what the NHS, the CDC and the World Health Organization say about each, and says plainly where they say nothing new.
Two things are worth knowing before the list. The sources describe averages for large groups, so how long and how much you smoked moves your own numbers. And they measure in different ways. Some compare you with someone who still smokes, others with the extra risk that smoking added. Both can be true at once, they answer different questions.
1 year without smoking
According to the NHS, after a year without smoking the risk of a heart attack is about half that of someone who still smokes, and the World Health Organization says the same of coronary heart disease. The CDC puts the sharp fall in heart attack risk at one to two years. It also places the easing of coughing and shortness of breath inside this first year.
2 years without smoking
The CDC gives one to two years for the sharp fall in heart attack risk, so the second year completes it. After that, it says, the risk keeps declining, only more slowly. None of the three sources names anything new at exactly two years. The fall has not stopped. It has become too gradual to mark by the month.
3 years without smoking
The CDC's next window opens here. Between three and six years after quitting, the extra risk of coronary heart disease that smoking added falls by half. This measures against the extra risk, not against a smoker, which is why it lands later than the NHS figure for year one.
4 years without smoking
Still inside the CDC's three to six year window for coronary heart disease. No source has a separate line for four years, and this page does not invent one.
5 years without smoking
Two things are dated from five years. The CDC says that between five and ten years the extra risk of cancers of the mouth, throat and voice box falls by half, and that the risk of stroke goes down. The World Health Organization puts the point where stroke risk reaches that of a non-smoker somewhere between five and fifteen years after quitting.
6 years without smoking
The end of the CDC's three to six year window. On its figures, the extra risk of coronary heart disease that smoking added has now been cut by half. Nothing new is dated to six years.
7 years without smoking
No source dates anything to seven years. You are in the middle of the CDC's five to ten year window for cancers of the mouth, throat and voice box, and of the World Health Organization's five to fifteen years for stroke. The risks are still moving in the right direction.
8 years without smoking
Nothing is dated to eight years either. The ranges are wide because people differ. Someone who smoked for ten years and someone who smoked for forty do not start from the same place, and an average hides that.
9 years without smoking
Nine years is not a milestone in any of the three sources. It is the last year before the ten year mark the NHS uses for lung cancer, and the closing stretch of the CDC's five to ten year window for cancers of the mouth, throat and voice box.
10 years without smoking
According to the NHS, after ten years the risk of dying from lung cancer falls to about half that of someone who still smokes. The CDC gives ten to fifteen years for the extra risk of lung cancer to halve, and says the risk of cancers of the bladder, oesophagus and kidney goes down. The World Health Organization adds cancers of the mouth, throat, cervix and pancreas to that list.
After ten years
The dates that remain are further apart. The CDC and the World Health Organization give fifteen years for the risk of coronary heart disease to come close to that of someone who never smoked. The CDC gives twenty for cancers of the mouth, throat, voice box and pancreas to come close to it, and for the extra risk of cervical cancer to halve.
Does it matter when you quit?
The World Health Organization compares people who quit with people who kept smoking. Quitting at about 30 gains almost ten years of life expectancy, at about 40 nine years, at about 50 six and at about 60 three. Earlier is better, and later still counts.
One thing to do
If you smoked for many years, tell your doctor how long, even long after you stop. That history still matters for some screening.