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Google 401(k): the match and mega backdoor Roth explained

By Vaibhav Goel, registered financial advisor and former Google employee

Updated September 30, 2026

Google matches 50% of your 401(k) contributions, up to $12,250 in 2026, and the match is yours immediately. The plan also supports the mega backdoor Roth, which lets you contribute up to $35,250 more after-tax and convert it to Roth. This page covers how the match works and how to set up the conversion at Vanguard.

Browse Google guides401(k) & mega backdoor Roth

How much does Google match?

Google matches 50% of what you contribute to your 401(k), up to the IRS limit. For 2026 that’s $12,250 if you contribute the full $24,500, and the match is yours immediately.

If you contribute less, Google matches your first $3,000 dollar for dollar whenever that works out to more. Either way, I’d contribute enough to get the full match before doing anything else on this page.

One thing to be careful about is front-loading your contributions early in the year. The match is paid each paycheck, so if you hit the limit in, say, August, you could miss the match for the remaining months. Unless you’ve confirmed that Google makes up the difference at year-end, I’d spread your contributions across the whole year.

The mega backdoor Roth at Google

Google’s 401(k) supports the mega backdoor Roth. You can make after-tax contributions beyond the regular limit and convert them to Roth inside the plan.

For 2026, there’s room for up to $35,250 of after-tax contributions if you’re under 50 and you contribute the full $24,500 with the full match. Google starts the after-tax contributions for you once you hit the regular limit, at 6% of pay unless you change it, but you have to turn on the Roth conversion yourself. Until after-tax money is converted, anything it earns is taxable, so I’d turn the conversion on before raising your after-tax rate.

How the mega backdoor Roth works covers the limits, catch-up contributions, and how it differs from a Roth 401(k) or a backdoor Roth IRA.

How to set it up

It helps to have your benefits elections, your Vanguard account, and a recent paystub open at the same time, so you can follow the money from your paycheck into the plan.

  1. Decide how much you can afford to contribute

    Make sure you’ll still have enough take-home pay for your expenses, your emergency fund, and anything big you’re saving for. Then set a target for the year.

  2. Find your after-tax contribution rate

    It’s a separate setting from your regular pre-tax or Roth contribution. Check whether the 6% default is what you want.

  3. Turn on the Roth conversion in Vanguard

    You can set after-tax contributions to convert to Roth automatically, convert them yourself from time to time, or roll them out to a Roth IRA. I’d pick the automatic option, since it keeps the taxable earnings close to zero.

  4. Check that the first conversion went through

    After your next paycheck, look at your Vanguard transaction history for both the after-tax contribution and the Roth conversion. If you see the contribution but no conversion, something isn’t set up right. Keep the confirmations for your tax preparer.

If you can’t find the conversion option, call Vanguard before you put in any more after-tax money. They can tell you how it’s set up for your account.

Google’s 401(k) at a glance

A few details about the plan that are useful to know.

Plan
Details
The Google LLC 401(k) Savings Plan has been around since 1999. Vanguard is the trustee and keeps the records.
Automatic enrollment
Details
You’re enrolled at 10% of pay pre-tax. Once you reach the regular limit, contributions continue at 6% after-tax unless you choose otherwise. Automatic escalation is turned on.
Default investment
Details
If you don’t choose investments, your money goes into a Vanguard Target Retirement trust.
Loans
Details
You can borrow from $1,000 up to the lesser of $50,000 or half your balance, usually repaid within five years, or longer if it’s for your primary home. In 2023, rates ranged from 4.00% to 9.50%.
When you leave
Details
You can leave your money in the plan or take it out. As of 2023, balances of $5,000 or less were paid out automatically, so check the current threshold if your balance is small.
Financial advice
Details
Goldman Sachs is the plan’s adviser, and Goldman Sachs Ayco and Vanguard provide financial education.

As of 2026, the plan had $62.4 billion in assets and 162,000 participants. 99% of eligible employees participate, the average contribution rate is 15%, more than three-quarters get the full match, and more than half make after-tax contributions.

Beyond the 401(k). Google’s benefits also include medical, dental, and vision insurance, flexible spending accounts, life and disability insurance, a survivor income benefit, a charitable gift match, and paid time off. It’s worth reviewing these alongside your partner’s benefits during open enrollment or when either of you changes jobs.

Planning overview

Meet your financial advisor

Simple Money Advisors LLC is a California state-registered investment adviser.

Vaibhav Goel, Registered financial advisor at Simple Money Advisors

Vaibhav Goel

Co-founder of Simple Money · Registered financial advisor · SEC record

Investment adviser representative, registered with the State of California.

Vaibhav was a Group Product Manager at Google before becoming a financial advisor. He also worked at DoorDash and Microsoft. At Simple Money, he helps people in tech coordinate equity, taxes, investments, and household cash flow.

Vaibhav Goel on LinkedIn

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Sources & editorial approach

Guide updated September 30, 2026. This guide draws on company filings, government guidance, and independent adviser guides. Each source notes the period it covers, and the examples are illustrations.

  1. [7] IRS: retirement contribution limits for 2026

    Employee deferral and age-based catch-up limits for the 2026 tax year.

  2. [8] IRS: rollovers of after-tax contributions

    Distinguishes after-tax contributions from their pretax earnings.

  3. [12] PLANSPONSOR: 2026 Alphabet retirement-plan profile

    Industry publication with attributed comments from Google financial benefits program manager Kyle Cotrufello. Supporting evidence, not a governing plan document.

  4. [26] IRS: 401(k) and profit-sharing contribution limits

    2026 annual-additions limit, catch-up exclusions, compensation limit, and plan-based restrictions.

  5. [31] Alphabet: 2026 proxy statement

    April 24, 2026. Grant timing on page 48; retirement provisions and 2025 match on page 49; 2025 median employee compensation and methodology on page 56. Historical disclosures do not confirm current individual benefits.

  6. [33] US Department of Labor EFAST2: Google LLC 401(k) Savings Plan, 2023 Form 5500

    Plan year 2023 annual return with audited financial statements for GOOGLE LLC 401(K) SAVINGS PLAN (sponsor EIN 77-0493581, plan number 001); search EFAST2 by plan name or EIN. Note 1 of the statements describes the plan as operated that year. The plan document and Summary Plan Description govern.

  7. [45] Coldstream Wealth Management: getting the most from your Google benefits

    Independent adviser guide by Katie Berntson, CFP, and Anne Marie Stonich, CFP, CPA, published October 31, 2025; checked September 29, 2026. Reports Morgan Stanley and Charles Schwab as stock-plan brokers, adjustable GSU withholding, and Roth conversion options for after-tax 401(k) contributions. Secondary reporting, not a plan document.

  8. [47] Arch Financial Planning: Google mega backdoor Roth 401(k)

    Independent adviser guide by Cecil Staton, CFP, checked September 29, 2026; written against 2025 limits. Reports in-plan Roth conversion of after-tax contributions in Google’s plan. Secondary reporting, not a plan document.

  9. [48] TrueWealth Financial Partners: guide to the Google 401(k) plan, 2026

    Independent adviser guide by Glenn Rossman, checked September 29, 2026. Reports a 2026 match of up to $12,250 deposited each paycheck and an in-plan Roth conversion that the participant must elect. Same publisher as the GSU guide above, so one line of evidence. Secondary reporting, not a plan document.

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General education for US employees, not personalized investment, tax, or legal advice. Your current award and benefit documents govern your individual terms. Niva Wealth, which publishes this guide, and Simple Money Advisors LLC, the author's firm, are independent of Google and Alphabet Inc. and are not endorsed by either.