Can I add pages to an expired passport?

No. Your passport must be valid. If it's expired or expiring soon, you need a new passport, which requires you to be in the US or go through the State Department by mail (slower and more complicated).

How many pages do they add?

24-28 pages, depending on the type of passport and what form you use. That's usually enough for another 5-10 years of travel.

Will this delay my travel plans?

If the consulate does same-day service, no. If they do 1-2 week processing, plan ahead. Never wait until the week before a trip to request pages.

Can I add pages at a consulate in a country I'm just visiting, not living in?

Technically yes, but you may be asked to prove you're a legal resident or that you have ties to that country. It's easier at the consulate in the country where you actually live.

What if my passport is damaged or the pages are falling out?

That's a renewal situation, not a page addition. You'll need to apply for a new passport, which you must do either in the US or through mail. You can't do it at the consulate.

Do the new pages cost more if I'm overseas?

No, it's $35 everywhere. Some posts may charge slightly more for expedited processing (1-2 day turnaround instead of 1-2 weeks), but standard service is the same price.

How to Add Pages to Your US Passport While Living Overseas

You can request passport pages at any US embassy or consulate abroad by submitting Form DS-11, your passport, a photo, and the $35 fee. Processing takes 1-2 weeks. You cannot renew your passport while overseas if you need a new one—you'll have to return to the US or wait until you're back.

Check if you actually need more pages. Open your passport to the visa and endorsement pages. If you have less than one full facing page left (two blank sides facing each other), you need pages added. Visa stamps take up space fast if you travel frequently. Some countries stamp both pages when you enter and exit.
Find your nearest US embassy or consulate. Go to travel.state.gov and use the embassy/consulate finder. Look specifically for one that handles passport services. Not all consulates offer passport services—call ahead or check their website first. The main embassy in a capital city always does; smaller consulates may not.
Gather your documents. You'll need: your valid passport, Form DS-11 (download and print from travel.state.gov, or fill out there), one passport photo (2x2 inches, taken within 6 months), and $35 in cash or card. Some posts only take certain payment methods—ask when you call.
Call ahead or check for appointments. Most embassies and consulates require an appointment for passport services. Go to the consulate website and look for their online appointment system. If there's no online system, call the American Citizens Services section directly. Tell them you need passport pages added, not renewal.
Go to your appointment. Arrive 10-15 minutes early. Bring your passport, DS-11, photo, and fee. Processing happens while you wait or takes 1-2 weeks depending on the post. Ask which when you arrive. You'll get a receipt telling you when to pick it up if it's not same-day.
Pick up your passport. Return on the date they give you. They'll have added 24-28 new pages to your passport. It's still the same passport book, just thicker. The original expiration date doesn't change.

Can I add pages to an expired passport?: No. Your passport must be valid. If it's expired or expiring soon, you need a new passport, which requires you to be in the US or go through the State Department by mail (slower and more complicated).
How many pages do they add?: 24-28 pages, depending on the type of passport and what form you use. That's usually enough for another 5-10 years of travel.
Will this delay my travel plans?: If the consulate does same-day service, no. If they do 1-2 week processing, plan ahead. Never wait until the week before a trip to request pages.
Can I add pages at a consulate in a country I'm just visiting, not living in?: Technically yes, but you may be asked to prove you're a legal resident or that you have ties to that country. It's easier at the consulate in the country where you actually live.
What if my passport is damaged or the pages are falling out?: That's a renewal situation, not a page addition. You'll need to apply for a new passport, which you must do either in the US or through mail. You can't do it at the consulate.
Do the new pages cost more if I'm overseas?: No, it's $35 everywhere. Some posts may charge slightly more for expedited processing (1-2 day turnaround instead of 1-2 weeks), but standard service is the same price.