Go daddy offer .com for $7.26 through coupon code. I have taken some. If I go for renew after 1 year what would be their price? Can I get coupon code for renewal also? or is it costlier than now?
Yes you can use coupon to get cheaper price during renewal. Or you can transfer the domain to a cheaper price domain registrar.
When you renew your domain name,it will be more expensive because you do not have any coupon.But that would not cost you so much compared to web hosting.
Only few GoDaddy coupons apply to renewals, so you usually end up paying higher price then the (new)registration or transfer price. The non-discounted price is around 10 USD per year now. Anyhow should you renew more domains at once or renew for more years, you may use coupons for up to 20% discount, so you pay around 8 USD per year.
Most coupons that GoDaddy offers are for new domains. Usually, you'll have to end up paying the original price of renewing which is only a few extra dollars more.