Fairly new account and has at least 1 year of good payment history. Your score can increase 20-55+ points depending on other factors.
Moderate account and has at least 3-5 years of good payment history. Your score can increase 50-100+ points depending on other factors.
Older account and has at least 7-10 years of good payment history. Your score can increase 100-300+ points depending on other factors.