Publication 560 Summarized — Retirement Plans for Small Business

Main points

• This publication explains retirement plan options that many small business owners first encounter only through forms and worksheets, making a conceptual overview essential.
• The publication works best when the reader uses it to understand the structure of the topic first, then turns to the official source for exact tests and computations.
• Tax treatment often depends on classification, timing and the interaction of multiple rules.
• Readers usually get the most value when they begin with the sections that match their immediate problem.

Common Mistakes to Avoid

• Starting with return preparation before understanding the governing concepts.
• Assuming the name of a credit, deduction, entity, or filing status tells the whole tax story.
• Using old tax assumptions or internet summaries without checking current IRS guidance.
• Treating recordkeeping and timing as secondary issues even though they often control the result.

Section-by-Section Summary

Why retirement plans are both tax tools and compensation structures

Publication 560 begins by framing retirement plans not just as tax deductions but as compensation structures that must satisfy IRS requirements. The publication helps readers understand how the IRS organizes plan types and what facts the taxpayer needs to identify before the correct return treatment can be determined.

How SEP plans work and where they fit best

SEP plans are the simplest option for self-employed individuals and small employers. The publication explains contribution limits, eligibility rules, and how SEP plans interact with other retirement vehicles.

How SIMPLE plans differ from SEP and larger qualified plans

SIMPLE plans serve businesses with 100 or fewer employees. The publication covers matching contribution requirements, salary reduction agreements, and how SIMPLE plans compare to SEPs in terms of administrative burden.

How qualified plans create larger but more complex opportunities

Qualified plans (defined benefit and defined contribution) allow higher contribution limits but come with more complex compliance requirements including nondiscrimination testing and reporting obligations.

Why contribution rules and deduction rules both matter

The publication distinguishes between what can be contributed to a plan and what can be deducted on the return. These are separate calculations that often trip up taxpayers who assume they are the same.

How employee coverage requirements shape the decision

When a business has employees, the plan choice affects not just the owner’s tax situation but also the required contributions for eligible employees. The publication covers participation and coverage rules.

Which planning mistakes small businesses make when choosing a plan

Common errors include choosing a plan type based solely on the owner’s desired contribution without considering employee costs, missing contribution deadlines, and failing to file required annual returns.

How Publication 560 should be used before plan selection and contribution timing

The publication is best used as a decision framework before selecting and funding a plan. It helps practitioners and business owners compare plan types systematically rather than relying on general advice.

How to Use This Publication

Start with the section most closely connected to your immediate problem. If your question is about eligibility, read the eligibility and classification sections first. If your question is about contribution limits, start there. This publication becomes much easier to use when treated like a decision guide rather than read cover to cover.

In real tax practice, this publication is rarely the only one that matters. Practitioners often pair it with form instructions or other publications that go deeper on narrower issues.

For related context, see our guides on Traditional IRA vs. Roth IRA vs. SEP IRA, S corporation benefits and reporting.