Your passport can be renewed at any time, though the Department of State website suggests renewing it within nine months of the passport expiration date, found on the passport's data page. Passports for Americans ages 16 and older are valid for 10 years, while those for younger children can be used for five years.
Also, do you keep your passport when you renew?
If your passport has already expired, you may still be able to renew your passport by mail. It may be sent separately from your new passport. It is a good idea to keep your old passport in a safe place as it is considered proof of your U.S. citizenship.
When should you renew your passport before it expires?
US passports are valid for 10 years from the date they are issued. It seems logical to assume that you should renew your passport two or three months before it expires. In fact, you may need to start the renewal process as early as eight months before your passport's expiration date, depending on your destination.
When can I renew my passport before it expires?
If your passport's expired, you must renew it before you can travel. You can renew your passport at any time. When you renew your passport, time left on your existing passport is added to your new one, up to a maximum of 9 months. If your passport will expire soon you might need to renew it before travelling.