Marathon Petroleum 401(k) Plan

Marathon Petroleum offers an employer match of Competitive employer match - the plan contributed 63% of employee deferrals ($9,840 per participant annually). Use our employer match calculator to see how much free money you could earn.

You can access your Marathon Petroleum 401(k) account through the plan provider's participant portal. The plan serves 18,320 active participants. If you're a current or former employee, use the login link above or contact the plan administrator at the phone number listed on this page. First-time users will need to register using their Social Security number and date of birth.

For 2026, Marathon Petroleum 401(k) participants can contribute up to $24,500 in employee deferrals. Participants aged 50+ can contribute an additional $8,000 in catch-up contributions (total $32,500). Those aged 60-63 can make super catch-up contributions of $11,250 (total $35,750). Currently, Marathon Petroleum participants contribute an average of $15,679 per year in employee deferrals. Employer contributions are separate from these limits.

Many Marathon Petroleum 401(k) plans offer loan provisions. As of the latest filing, Marathon Petroleum participants had $116.1M in outstanding loans (averaging $6,338 across participants with active loans). The IRS limits 401(k) loans to the lesser of $50,000 or 50% of your vested balance. With an average account balance of $454K in the Marathon Petroleum plan, the maximum potential loan amount for a fully vested participant would vary accordingly. Check with your plan administrator for specific loan terms, or see our withdrawal rules guide.

When you leave Marathon Petroleum, you have several options for your 401(k): keep it in the plan (if the balance is over $7,000), roll it over to a new employer's plan, roll it to an IRA, or take a cash distribution (subject to taxes and potential penalties). In the most recent filing year, the plan processed $721.5M in distributions to departing or retired participants. Employer match contributions may be subject to a vesting schedule.

According to the most recent Form 5500 filing, the Marathon Petroleum 401(k) plan has 18,320 active participants managing $8.3B in plan assets. The average account balance is $454K per participant.

Many major employers, including Marathon Petroleum, offer both traditional pre-tax and Roth after-tax 401(k) contribution options. Given that Marathon Petroleum participants average $15,679 in annual deferrals, choosing between Roth and traditional depends on whether you expect your tax bracket to be higher or lower in retirement. Contact the Marathon Petroleum plan administrator for availability.

The Marathon Petroleum 401(k) plan typically offers a range of investment options including target-date funds, index funds, actively managed funds, and potentially company stock. The plan generated $1.5B in total investment income during the last filing year. Use our 401(k) calculator to project growth, or log into your account to see current options.

Marathon Petroleum (MPC) may offer company stock as an investment option within the 401(k) plan. Be mindful of concentration risk - financial advisors typically recommend limiting company stock to no more than 10-15% of your portfolio, especially given that your employment income already depends on Marathon Petroleum's performance.

For 2026, Marathon Petroleum matches Competitive employer match - the plan contributed 63% of employee deferrals ($9,840 per participant annually). The 2026 employee deferral limit is $24,500 ($32,500 if 50+, $35,750 if 60-63). Use our match calculator to estimate your free money.