The most important thing to know about PhD costs in the USA: most fully funded PhD programmes pay you to study. Tuition is waived, and students receive a stipend — meaning the out-of-pocket cost for a fully funded US PhD is often close to zero, or even net positive. This guide explains how PhD funding works, what a fully funded offer looks like, and what costs remain.
How US PhD Funding Works
Unlike master's degrees, which are usually self-funded, PhD programmes in the USA routinely come with full funding packages at research universities:
| Funding Component | What It Covers |
|---|---|
| Tuition waiver | Eliminates all tuition costs (typically $30,000–$65,000/year) |
| Stipend | Living allowance of $16,000–$40,000/year depending on field and location |
| Health insurance | Covered by the university in most funded positions |
| Fees | Partially or fully covered |
The net annual cost of a fully funded US PhD: -$16,000 to +$5,000 (i.e., you receive more in stipend than you pay in fees in most cases).
PhD Funding Rates by Field
Not all PhD programmes are equally likely to offer full funding:
| Field | Funding Rate | Typical Stipend (USD/year) |
|---|---|---|
| Natural Sciences (Chemistry, Physics, Biology) | Very high (>90%) | $24,000 – $35,000 |
| Engineering (all disciplines) | Very high (>90%) | $24,000 – $38,000 |
| Computer Science | Very high (>95%) | $28,000 – $45,000 |
| Mathematics and Statistics | High (80–90%) | $22,000 – $32,000 |
| Economics | High (80–90%) | $24,000 – $35,000 |
| Social Sciences (Political Science, Sociology) | Moderate–High (60–80%) | $18,000 – $28,000 |
| Humanities (History, Literature, Philosophy) | Moderate–High (50–80%) | $16,000 – $26,000 |
| Business / Management | Moderate (50–70%) | $22,000 – $35,000 |
| Education | Moderate (40–60%) | $16,000 – $24,000 |
| Fine Arts (MFA treated as terminal) | Lower | Varies |
What a Fully Funded PhD Offer Looks Like
A typical funded PhD offer letter will state:
- Full tuition waiver for the duration of the programme (typically 5 years)
- Annual stipend (e.g., $30,000/year) in exchange for teaching or research duties
- Student health insurance covered by the department
- Term of funding: typically 4–6 years subject to satisfactory progress
Example: A fully funded Computer Science PhD at a top-20 US university might include a $34,000/year stipend, full tuition waiver, and health insurance — a total package worth $85,000–$100,000/year.
PhD Stipends by University and Field (2026 Estimates)
Computer Science / Engineering / Sciences
| University | Annual Stipend (USD) |
|---|---|
| MIT | $38,000 – $44,000 |
| Stanford | $38,000 – $45,000 |
| Carnegie Mellon | $35,000 – $42,000 |
| Caltech | $38,000 – $42,000 |
| UC Berkeley | $34,000 – $40,000 |
| Cornell | $30,000 – $36,000 |
| University of Michigan | $28,000 – $35,000 |
| Georgia Tech | $24,000 – $32,000 |
| Purdue | $22,000 – $30,000 |
| University of Illinois | $24,000 – $32,000 |
Humanities and Social Sciences
| University | Annual Stipend (USD) |
|---|---|
| Harvard (GSAS) | $26,000 – $32,000 |
| Yale (GSAS) | $26,000 – $32,000 |
| Princeton | $28,000 – $34,000 |
| Columbia | $26,000 – $32,000 |
| NYU | $22,000 – $28,000 |
| UC Berkeley | $22,000 – $28,000 |
What You Still Pay as a PhD Student
Even with a fully funded offer, international PhD students typically pay:
| Expense | Annual Cost (USD) |
|---|---|
| University fees (not covered by waiver) | $500 – $3,000 |
| Health insurance co-pays and dental | $500 – $2,000 |
| Books and equipment | $500 – $1,500 |
| Personal living expenses (above stipend) | $0 – $10,000+ depending on city |
| US tax on stipend income | Typically 10–22% of stipend |
Stipend tax: F-1 visa PhD students pay US income tax on their stipend. In higher-stipend cities, this can reduce net take-home pay — factor this into your budget.
Living on a PhD Stipend — City by City
| City | Monthly Stipend | Monthly Living Cost | Net Monthly Surplus/Deficit |
|---|---|---|---|
| MIT (Boston/Cambridge) | ~$3,200 | $2,500 – $4,000 | -$800 to +$700 |
| Stanford (Bay Area) | ~$3,500 | $3,000 – $4,500 | -$1,000 to +$500 |
| Princeton (NJ) | ~$2,600 | $1,800 – $2,800 | -$200 to +$800 |
| University of Michigan | ~$2,700 | $1,600 – $2,400 | +$300 to +$1,100 |
| Purdue | ~$2,200 | $1,000 – $1,600 | +$600 to +$1,200 |
| Georgia Tech | ~$2,400 | $1,200 – $2,000 | +$400 to +$1,200 |
PhD students at Purdue, Georgia Tech, and other lower cost-of-living universities often live comfortably on their stipend with money to spare.
Unfunded vs. Funded PhD — Never Pay Out of Pocket
Never enrol in a PhD programme that does not offer full funding (unless you have independent financial support). An unfunded PhD offer means:
- You pay tuition ($30,000–$65,000/year) out of pocket
- No stipend to support living costs
- Typically not a sign of a strong research match between you and the supervisor
An unfunded PhD at a prestigious university is generally worse than a fully funded PhD at a slightly less prestigious programme. Funding is a signal of departmental commitment to your success.
F-1 Visa and Work Rights for PhD Students
| Work Type | Permitted |
|---|---|
| On-campus (TA, RA) | Yes — the primary funding mechanism |
| OPT (after graduation) | 12 months standard; 36 months if STEM |
| CPT (Curricular Practical Training) | Yes, during PhD if tied to curriculum |
| Off-campus without authorisation | No — visa violation |
TOEFL Requirements for US PhD Programmes
| University | TOEFL Min (PhD) | IELTS Min |
|---|---|---|
| MIT | No formal min (competitive 110+) | No formal min |
| Stanford | No formal min | No formal min |
| UC Berkeley | 90 | 7.0 |
| Cornell | 77 | 6.5 |
| University of Michigan | 84 | 6.5 |
| Georgia Tech | 79 | 6.5 |
| Purdue | 77 | 6.5 |
Speaking section scores are scrutinised carefully for Teaching Assistant eligibility — a minimum of 23–25 Speaking is typically required to teach undergraduate courses.
Prepare for TOEFL with Gabble — reach the competitive TOEFL score US PhD programmes expect, including the Speaking section score required for Teaching Assistantships.