A Vanguard Roth IRA has no account minimum and gives you access to VTSAX (0.04% expense ratio) and VTI (0.03%) — among the lowest-cost index funds in the world. The 2026 contribution limit is $7,000 per year ($8,000 for those 50 and older). All qualified withdrawals in retirement are completely tax-free. Vanguard’s investor-owned structure and ultra-low fund costs make it a natural home for the three-fund Roth IRA portfolio strategy.
2026 Roth IRA Contribution Limits
| Filing status | Full contribution | Phase-out range | Above limit |
|---|---|---|---|
| Single / Head of Household | Under $150,000 MAGI | $150,000–$165,000 | Backdoor Roth only |
| Married Filing Jointly | Under $236,000 MAGI | $236,000–$246,000 | Backdoor Roth only |
| Married Filing Separately | Under $10,000 MAGI | $0–$10,000 | Backdoor Roth only |
| Age | Annual contribution limit |
|---|---|
| Under 50 | $7,000 |
| 50 or older | $8,000 (includes $1,000 catch-up) |
Limits apply across all your IRAs combined. The 2026 tax year contribution deadline is April 15, 2027.
Why Choose a Vanguard Roth IRA?
Vanguard’s core advantage is cost. Its funds are structured as investor-owned — Vanguard has no outside shareholders extracting profit — which keeps expense ratios at or near the industry minimum.
For a Roth IRA, lower costs directly translate to more tax-free wealth at retirement. Every basis point saved in expense ratio is a basis point that stays in your account, growing tax-free for decades.
Vanguard also invented the index fund. Jack Bogle launched the first retail index fund at Vanguard in 1976. The platform is purpose-built for passive, long-term investing — exactly the strategy that benefits most from the Roth IRA tax-free structure.
The Vanguard Three-Fund Roth IRA Portfolio
The three-fund portfolio is a complete investment strategy using just three ETFs or mutual funds. It’s especially popular in Roth IRAs because of its low cost and simplicity.
| Fund | What it holds | Expense ratio | Minimum |
|---|---|---|---|
| VTI | US total stock market (4,000+ stocks) | 0.03% | ~1 share (~$260) |
| VXUS | International stocks (ex-US) | 0.08% | ~1 share (~$60) |
| BND | US total bond market | 0.03% | ~1 share (~$75) |
Sample allocations by age:
| Age | VTI | VXUS | BND |
|---|---|---|---|
| 25–35 | 70% | 20% | 10% |
| 36–45 | 65% | 20% | 15% |
| 46–55 | 55% | 15% | 30% |
| 56–65 | 45% | 15% | 40% |
In a Roth IRA, stock funds (VTI, VXUS) generate the most tax-free benefit because they have the highest expected long-term growth. Bonds (BND) generate income that would normally be taxed — in a Roth, that income is tax-free too.
VTSAX vs. VTI in a Roth IRA
VTSAX (Admiral Shares mutual fund) and VTI (ETF) track the same index with nearly identical expense ratios. The practical difference:
| VTSAX | VTI | |
|---|---|---|
| Type | Mutual fund | ETF |
| Expense ratio | 0.04% | 0.03% |
| Minimum investment | $3,000 | Price of 1 share (~$260) |
| Auto-invest | Yes | No (must place orders manually) |
| Fractional shares | No (at Vanguard) | No (at Vanguard) |
| Dividend reinvestment | Automatic | Automatic |
For a Roth IRA with under $3,000: Buy VTI. Same exposure, no minimum, lower expense ratio. For a Roth IRA with $3,000+: Either is excellent. VTSAX allows automatic investment of dollar amounts; VTI requires whole-share purchases.
See the Vanguard best funds guide for a deeper VTSAX vs VTI analysis.
What to Invest in a Vanguard Roth IRA
| Priority | Investment | Rationale |
|---|---|---|
| 1st | VTI (US stocks, 0.03%) | Highest long-term growth, lowest cost |
| 2nd | VXUS (international, 0.08%) | Diversification, tax-free international gains |
| 3rd | VDIGX or VIG (dividend growth) | Dividend income compounds tax-free in Roth |
| Optional | VNQ (REITs, 0.12%) | High dividend yield — ideal in tax-free account |
| Avoid | VTEB (municipal bonds) | Already tax-exempt; Roth advantage is wasted |
The 5-Year Rule
To withdraw Roth IRA earnings tax-free:
- You must be at least 59½ years old
- The Roth IRA must have been open for at least 5 tax years
The 5-year clock starts January 1 of the first year you contributed, regardless of when in that year you opened the account. Your contributions can be withdrawn at any time without tax or penalty.
Backdoor Roth IRA at Vanguard
For income above $165,000 (single) or $246,000 (married):
- Open a Vanguard Traditional IRA — no income limits apply to contributions
- Contribute non-deductibly — up to $7,000 / $8,000
- Wait for the funds to settle (1–2 business days; keep the money in the settlement fund, not invested)
- Convert to Roth — log in to vanguard.com → My Accounts → [Traditional IRA] → Convert to Roth IRA
- File Form 8606 — IRS form that establishes your non-deductible basis
Vanguard’s conversion process is online and typically completes within one business day. If you have pre-existing pre-tax Traditional IRA assets at Vanguard, consult a tax professional about the pro-rata rule before proceeding.
Vanguard’s Limitations for Roth IRA Investors
Be aware of these trade-offs before opening a Vanguard Roth IRA:
- No fractional shares — you can only buy whole shares of VTI (~$260/share). With $7,000 to invest, you’ll typically have $100–$200 in uninvested cash after purchases
- No 24/7 phone support — Vanguard’s customer service closes at 8pm ET weekdays; no weekend phone lines
- $3,000 mutual fund minimum — VTSAX requires $3,000; new investors must start with ETFs
- Older platform UX — the website and app are functional but less polished than Fidelity or Schwab
For investors who want fractional shares from $1 or a more modern platform experience, Fidelity’s Roth IRA is the stronger option. For Vanguard fund access at a broker with a better platform, Schwab and Fidelity both offer Vanguard ETFs (VTI, VXUS, BND) with $0 commission.
How to Open a Vanguard Roth IRA
- Go to vanguard.com → “Open an Account” → “Roth IRA”
- Complete the application — Social Security number, address, beneficiary
- Link your bank account for funding
- Contribute up to $7,000 for the 2026 tax year (deadline: April 15, 2027)
- Purchase VTI (or VTSAX if balance is $3,000+) and VXUS for a simple two-fund Roth IRA
See the full Vanguard IRA guide for Traditional IRA and rollover options.
The content on Wealthvieu is for informational purposes only and should not be considered financial, tax, or investment advice. Consult a qualified professional before making financial decisions. Full disclaimer · Editorial policy