A Practical Guide to the Most Common Retirement Plans—and the 2025 Deadlines Taxpayers Can’t Afford to Miss

Updated: Dec 11, 2025

Retirement planning remains one of the most powerful tools for reducing taxable income and building long-term wealth. Whether you are an employee maximizing workplace benefits or a business owner designing a customized retirement strategy, understanding the differences between retirement account types and how much you can contribute is essential.

For 2025, contribution limits have increased across several plans, giving taxpayers more opportunities to defer income and grow investments tax-advantaged. Below is an overview of the most commonly used retirement plans and the planning considerations that matter most.

Traditional IRA and Roth IRA: Foundational Retirement Tools

Traditional and Roth IRAs are widely used because of their flexibility and low barriers to entry. Although their tax treatment differs, both accounts play a central role in long-term planning.

A Traditional IRA may offer a tax deduction depending on income and whether you or your spouse are covered by a workplace retirement plan. For 2025, the Traditional IRA deduction begins to phase out at $77,000–$87,000 for single filers covered by a workplace plan, $123,000–$143,000 for married couples filing jointly where the contributor is covered, and $230,000–$240,000 when your spouse is covered but you are not.

IRAs are excellent for individuals seeking to supplement an employer retirement plan—or those without access to one. I encourage clients to take advantage of IRA contributions annually whenever possible. And importantly, even if your income exceeds the Roth IRA limits ($171,000 single or $250,000 MFJ in 2025), you may still make contributions through a Backdoor Roth IRA, a strategy available to high-income earners.

2025 Contribution Limit:

$7,000, or $8,000 for those age 50+ (catch-up)

401(k) and 403(b): High Contribution Limits and Employer Support

Employer-sponsored retirement plans, such as 401(k)s and 403(b)s, offer some of the highest contribution limits available to employees. They frequently include employer matches or profit-sharing, creating powerful compounding opportunities. Plans may offer both

Traditional (pre-tax) and Roth contribution options, allowing participants to customize their tax strategy.

2025 Contribution Limit:

Employee deferral: $23,500

Catch-up contribution (age 50+): $7,500

Combined employee + employer maximum: $69,000

or $76,500 with catch-up

These plans often serve as the backbone of retirement savings for wage earners and professionals.

SIMPLE IRA: Designed for Small Businesses

For small businesses seeking a streamlined retirement plan, the SIMPLE IRA provides a balance of affordability and meaningful savings. Employees can defer salary, while employers must either match contributions or make a fixed non-elective contribution.

2025 Contribution Limit:

Employee contribution: $16,000

Catch-up (age 50+): $3,500

Employer match or contribution rules apply based on plan structure.

SIMPLE IRAs are attractive to small employers looking for lower administrative requirements than a 401(k).

SEP IRA: A Flexible Option for Self-Employed and Small Businesses

The SEP IRA is funded entirely by employer contributions (including self-employed individuals acting as their own employer). Its flexibility and generous limits make it ideal for fluctuating income levels.

2025 Contribution Limit:

Up to 25% of compensation, capped at $69,000

SEP IRAs are popular for freelancers, consultants, and small business owners who want to maximize deductions without ongoing administrative burdens.

Solo 401(k): Maximum Savings for Businesses With No Employees

The Solo 401(k) allows business owners with no employees (other than a spouse) to contribute both as employee and employer, producing the highest possible retirement savings opportunity for self-employed individuals. Both pre-tax and Roth contributions are typically available.

2025 Contribution Limit:

Up to $69,000 combined

$76,500 with catch-up contributions

For entrepreneurs aiming to defer substantial income, the Solo 401(k) often outperforms both SEP IRAs and SIMPLE IRAs.

Cash Balance Plan: The Premier Strategy for High-Income Earners

Cash Balance Plans—hybrid defined benefit plans—have grown rapidly among high-income professionals and business owners wanting six-figure retirement deductions. These plans provide a “hypothetical account balance,” but contributions are actuarially determined and can be very large depending on age and income.

2025 Contribution Range:

Varies significantly by age

Older participants may contribute $150,000 to $300,000+ annually

Cash Balance Plans are often paired with 401(k)/profit-sharing plans to maximize tax advantages.

“Super Roth IRA”: A Powerful Strategy for High-Income Business Owners

A “Super Roth IRA” is a sophisticated planning strategy used by high-income business owners to build substantial future tax-free retirement wealth while also capturing current deductions. The structure typically involves the owner’s self-directed Roth IRA, their operating business, a dedicated Insurance LLC, and a carefully designed risk-transfer arrangement intended to avoid issues associated with micro-captives. When implemented correctly, this strategy allows the Roth IRA to generate tax-free earnings far beyond standard contribution limits—often reaching six or seven figures— while the operating business may benefit from large deductible payments. For business owners with strong, predictable cash flow, a Super Roth IRA can be a uniquely powerful long-term planning tool. Consult LightUp Tax to evaluate whether this strategy aligns with your goals and compliance requirements.

Retirement Plan

Deadline to Establish the Account

Contribution Deadline

Traditional IRA

Tax Day (Apr 15, 2026)

Tax Day (Apr 15, 2026)

Roth IRA

Tax Day (Apr 15, 2026)

Tax Day (Apr 15, 2026)

401(k) / 403(b)

Dec 31, 2025

Employee deferrals: Dec 31, 2025 Employer contributions: Business tax filing deadline, including extension

SIMPLE IRA

Oct 1, 2025

Employee deferrals: Dec 31, 2025 Employer match: Business tax filing deadline, including extension

SEP IRA

Business tax filing deadline, including extension

Business tax filing deadline, including extension

Solo 401(k)

Dec 31, 2025

Employee deferrals: Dec 31, 2025 Employer contributions: Business tax filing deadline, including extension

Cash Balance Plan

Typically Dec 31, 2025

Business tax filing deadline, including extension

Take the next step toward maximizing your 2025 retirement contributions and tax savings. We’ll help you identify the most advantageous paths, ensure you don’t miss critical deadlines, and position you for long-term, tax-efficient wealth building.

Book a free discovery call with our CPA here.