How PhD Funding Really Works in the US: RA, TA, and Fellowships

"Fully funded" sounds simple until you learn that your funding comes from one person's grant, renews conditionally, and usually requires you to work for it. Understanding how US PhD funding works — before you apply — changes how you choose programs and advisors.

1. The three ways a PhD is funded

Type	Who pays	What you do	Typical
Research Assistant (RA)	Your advisor's grant	Work on their funded research	Most common in STEM
Teaching Assistant (TA)	The department	Teach or grade courses	Common in humanities / some STEM
Fellowship	University, NSF, or your country	Your own research, no work requirement	Competitive; also affects visa

Most students are funded by a mix: fellowship year(s), then RA/TA. The mix is written into your offer letter — read it.

2. What "fully funded" actually covers

• Tuition waiver — you pay no tuition (separate from the stipend).
• Stipend — living money, typically ~$25k–$40k/year depending on field and city (higher in CS/EE and expensive cities).
• Health insurance — usually subsidized or included.
• Not covered: most fees, and often summer — ask whether summer funding is guaranteed.

3. The rule that shapes everything: funding follows the advisor

RAs are paid from an advisor's grant. That means:

• An advisor without funding cannot take you, no matter how good your application is.
• An advisor with funding has real incentive to hire: they need the labor.
• New assistant professors often have startup packages and hire early — not just for science, but because the grant requires staffing.

This is the hidden link between "who is hiring" and "who can fund you". Your fit with a funded, active professor is worth more than a famous department.

4. Questions to ask before you accept

1. How many years of funding are guaranteed, and in what form (RA/TA/fellowship)?
2. Is summer covered, or do I need to find a summer RA each year?
3. What happens if my advisor's grant doesn't renew — is the department committed to TA support?
4. Does a conference travel budget exist?

5. Why this connects to choosing an advisor

Advisors with recent publications and active grants are the ones who can actually admit and fund you. That's the same signal you use to build your shortlist: active research, recent output, hiring pages updated. When you match to a professor whose current work fits, you're also (usually) matching to someone with the means to pay you.