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Guides · US Tax

US Tax guides

1,454 plain-English guides on us tax, each one ending in what to do next.

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Page 35 of 61, newest first.

US Tax

Retirement Plan Comparison for Small Business Owners: Solo 401(k), SEP-IRA, SIMPLE IRA, and Defined Benefit

Solo 401(k) allows $23,500 employee deferral plus up to $46,500 employer contribution ($70,000 total for 2025). SEP-IRA allows 25% of compensation.

Sep 5, 2026
US Tax

Retirement Plan Comparison for Self-Employed: SEP IRA vs. Solo 401(k) vs. SIMPLE IRA

The Solo 401(k) allows the highest contributions for most self-employed business owners ($23,500 employee + 25% employer = up to $70,000 total in 2025).

Sep 5, 2026
US Tax

SEP IRA vs. Solo 401(k) vs. SIMPLE IRA: Retirement Plan Comparison for Small Business

Solo 401(k) allows the highest contribution ($23,500 employee + 25% employer, up to $70,000 combined for 2025).

Sep 5, 2026
US Tax

Retirement Plans for Small Businesses with Employees: SIMPLE IRA, SEP, and 401(k)

Small businesses with employees have different retirement plan considerations than solo operators.

Sep 5, 2026
US Tax

Small Business Retirement Plans: Solo 401(k) vs. SEP IRA vs. SIMPLE IRA (2025)

The Solo 401(k) allows the highest contributions ($70,000 in 2025 for those under 50, $73,500 for 50+, $81,250 for ages 60-63).

Sep 5, 2026
US Tax

Retirement Plan Startup Tax Credit: Up to $15,000 for New 401(k) or SIMPLE Plans (SECURE 2.0)

Small businesses with up to 50 employees can claim a tax credit of up to $5,000/year for 3 years for starting a retirement plan.

Sep 5, 2026
US Tax

R&D Tax Credit for Small Businesses (IRC 41): Complete Guide

Small businesses with under $5 million in gross receipts can use the R&D credit to offset payroll tax (up to $500,000/year).

Sep 5, 2026
US Tax

ROBS (Rollover for Business Startups): Using Retirement Funds to Start a Business Tax-Free

A Rollover for Business Startups (ROBS) is a strategy that allows an entrepreneur to use funds from an existing retirement account (401(k), IRA.

Sep 5, 2026
US Tax

Roth IRA Conversions for Business Owners: Timing, Income Management, and the Backdoor Strategy

Business owners can manage their income through salary, distributions, and deductions to optimize Roth conversions.

Sep 5, 2026
US Tax

S-Corp Election: Form 2553 Requirements, Deadlines, and Late Election Relief

S-Corp eligibility requirements (IRC 1361): | Requirement | Details | |------------|---------| | Domestic corporation | Must be organized in the U.S.

Sep 5, 2026
US Tax

S-Corp Election Timing: Deadlines, Late Election Relief, and When It Makes Sense

An S-Corp election (Form 2553) must be filed by March 15 of the tax year to be effective for that year (or within 2 months and 15 days of formation for.

Sep 5, 2026
US Tax

S-Corp Late Filing Penalty: How to Avoid and Abate the $235/Month Per-Shareholder Penalty

The S-Corp late filing penalty is $235 per shareholder per month (up to 12 months). For a single-owner S-Corp filing 3 months late, that is $705.

Sep 5, 2026
US Tax

S-Corp Reasonable Compensation: How to Set Owner Salary, IRS Audit Factors, and Payroll Tax Savings

Setting reasonable compensation for an S-Corp owner-employee is the most important and most frequently litigated tax planning decision for S-Corporation.

Sep 5, 2026
US Tax

S-Corp Shareholder Basis and AAA Tracking: How Distributions, Losses, and Income Affect Your Tax Position

Every S-Corp shareholder must track two separate accounts that determine the tax treatment of distributions and the deductibility of losses.

Sep 5, 2026
US Tax

S-Corp Shareholder Basis and Distributions: AAA, OAA, PTI, and the Ordering Rules That Determine Taxability

S-Corp shareholder basis is the single most misunderstood concept in small business taxation.

Sep 5, 2026
US Tax

Small Business Sales Tax: Nexus Rules, Collection Obligations, and Common Mistakes

After South Dakota v. Wayfair (2018), businesses can have sales tax nexus in states where they have no physical presence.

Sep 5, 2026
US Tax

Sales Tax Nexus for Small Businesses: When You Must Collect and Remit

After South Dakota v. Wayfair (2018), states can require sales tax collection from remote sellers who meet economic nexus thresholds (typically $100,000.

Sep 5, 2026
US Tax

Sales Tax Nexus After Wayfair: Economic Nexus, Marketplace Facilitator Laws, and Compliance

The 2018 Supreme Court decision in South Dakota v. Wayfair (585 U.S. Economic nexus thresholds (most common): | Threshold Type | States Using It |.

Sep 5, 2026
US Tax

Sales Tax Nexus and Obligations for Small Business Owners

After the Wayfair decision (2018), states can require sales tax collection from remote sellers with economic nexus (typically $100,000 in sales or 200.

Sep 5, 2026
US Tax

Sales Tax on Services: Which States Tax Service Businesses and How to Comply

Most states exempt services from sales tax, but a growing number tax specific service categories. States that broadly tax services (most services taxable).

Sep 5, 2026
US Tax

Accountable Plan for S-Corp Owners: Tax-Free Expense Reimbursement

An accountable plan allows an S-Corp to reimburse the owner-employee for business expenses tax-free.

Sep 5, 2026
US Tax

S-Corp Basis Tracking: Why It Matters and How to Calculate Shareholder Basis

S-Corp shareholders must track their stock and debt basis to determine the deductibility of losses, the tax treatment of distributions.

Sep 5, 2026
US Tax

S-Corp Shareholder Basis Tracking: Why It Matters and How to Do It

S-Corp shareholders must track their stock basis and debt basis separately. Distributions exceeding basis are taxable as capital gains.

Sep 5, 2026
US Tax

S-Corp Late Election Relief: Rev. Proc. 2013-30 Explained

Missed the March 15 deadline for S-Corp election? Rev. Proc. 2013-30 allows late filing if (1) the entity intended to be an S-Corp.

Sep 5, 2026