I used a coupon that expires at the end of the year. I've got the credit in my Adwords account now. Can I pause my ad and spend the remaining free credit next year?
I believe if you'd already added the promo code to your account, you will still have those credits in your account after the expiration date. If you haven't added it to your account by then, I think some of codes just drop in value(a $100 code drops to $75, I think, after the expiration date).