Here is something that drives me a little crazy. The Common App has a fee waiver built right in, and every year students scroll straight past it because nobody explained how it works. So: the plain version.
Inside the Common App there is a fee waiver request section. You answer a few questions about your finances, select the waiver, and your school counselor confirms it. Once it is confirmed, the waiver covers every Common App school you apply to. One application fee waiver request through the Common App, many schools covered. That is the whole mechanism. It takes minutes.
The common app fee waiver requirements are broader than people assume. They cover the obvious stuff like family income thresholds, but also situations like foster care, homelessness, or participation in certain support programs. If money is genuinely tight, you very likely qualify. The criteria are designed to include people, not trip them up.
International students, one wrinkle. The process leans on having a counselor to confirm the request, and that shapes the application fee waiver eligibility for international students more than anything else. If your school does not have a designated counselor, or they have never done this, start the conversation in September. Walk them through it. Do not discover in December that nobody at your school knows what a fee waiver confirmation is.
Also: the Common App waiver covers Common App schools only. Universities with their own portals run their own separate waiver processes, and you handle those individually. This is where an application fee waiver finder app for iOS or Android earns its keep. It covers the non-Common App schools on your list, the ones with separate portals and separate rules.
If your counselor is new to this, send them the Common App's own recommender guide first. It is written for them, answers their questions, and makes their job easy. An easy job gets done faster.
Learn the waiver rules at applicationexperts.fyi. And get a 1-2 year profile roadmap to get ahead of all of this.