How much does a slow pay, 60 days, hurt your score?
Hurts a lot
The older it gets the less of the hurt that being said a new one will sting a long time
30 and 60 day lates are minor derogs. They hurt bad at first, but diminish fairly quickly. They lose some sting after 6 months, quite a bit after a year. After 2 years, they really don't factor in.