Small business tax planning in 2026 involves more than preparing a return after the year ends. For business owners in Los Angeles and throughout California, current-year planning may involve federal tax-law changes, estimated-tax projections, California pass-through entity rules, owner-level tax considerations, bookkeeping accuracy, and year-end documentation.
This publication explains which 2026 developments are especially relevant to small businesses and how they fit together before year-end. It is general and educational; the exact tax treatment depends on entity type, ownership structure, accounting method, income level, and other facts.
Federal changes affecting business owners in 2026; the 2026 qualified business income deduction framework; California PTE elective-tax changes; estimated-tax planning for owners; owner compensation and entity records; bookkeeping and fixed-asset information used in year-end projections; and the distinction between business-level records and owner-level tax consequences.
1. Federal Tax Changes Matter to 2026 Projections
Planning should use the rules applicable to the current year rather than carrying forward 2025 assumptions. One notable 2026 development is the qualified business income deduction (QBID / Section 199A). The IRS states recent legislation made the deduction permanent; beginning in 2026, taxpayers with at least $1,000 of qualified business income from an active trade or business may qualify for a minimum $400 deduction, subject to requirements, and the phase-in range increased to $150,000 (married filing jointly) and $75,000 (other statuses).
The useful year-end question is not simply whether the business qualifies, but: does projected 2026 business and owner-level income still reflect the rules that will apply when the return is prepared? For sole proprietorships and pass-through entities, business results interact with the owner's individual return — which is why business books and owner-level planning are reviewed together. See Small Business CPA in Los Angeles and Tax Planning in Los Angeles.
2. Estimated Taxes Should Reflect Current Business Results
Owners whose income is not fully covered by withholding may need estimated-tax payments. Federal estimated tax may apply when at least $1,000 of tax is expected to remain after withholding and credits, and withholding is below the required annual payment threshold. Those calculations are based on expected 2026 results, so material income changes during the year can make an earlier projection stale.
California estimated taxes follow different rules
| Payment | Percentage | Due date |
|---|---|---|
| First | 30% | April 15, 2026 |
| Second | 40% | June 15, 2026 |
| Third | 0% | September 15, 2026 |
| Fourth | 30% | January 15, 2027 |
Individuals whose 2026 California AGI is $1 million or more ($500,000 married/RDP filing separately) generally must use current-year California tax rather than the prior-year safe harbor. See Quarterly Estimated Taxes 2026 and California Estimated Tax Payments 2026.
3. California PTE Tax Changed for 2026
California extended the PTE elective tax and related credit for taxable years beginning on or after January 1, 2026 and before January 1, 2031. A key change: for 2026–2030, a qualifying entity may still make the election when the required June 15 prepayment is missed or underpaid — but the credit is reduced by 12.5% of the pro rata share of the unpaid amount required by June 15. The required June 15 payment generally remains the greater of $1,000 or 50% of the prior year's PTE elective tax.
Even though June 15 has passed, the payment history affects the PTE credit available to owners. A year-end review can identify whether an election is expected, what was actually paid by June 15, whether a credit reduction applies, and what entity-level payment may be due with the return. See California PTE Elective Tax 2026.
4. Business Tax Planning and Owner Tax Planning Are Connected
For pass-through businesses, the entity's records and the owner's individual return are related but not identical. Year-end planning may distinguish business-level information (revenue, deductible expenses, payroll, fixed assets, loans, partner/shareholder transactions, entity-level taxes, distributions) from owner-level information (wages, pass-through income, estimated payments, other income, withholding, investment activity, individual credits). A business may have accurate books while the owner's overall projection still shifts due to activity outside the entity.
5. Entity Structure — Focus on the Actual 2026 Entity
Entity structure matters, but year-end is not the moment for a generic "S-Corp vs. LLC" comparison. The focused questions: Is the current entity type reflected correctly in accounting and payroll? Are owner payments classified consistently? Are shareholder/partner transactions documented? Are required California entity-level taxes recorded? Are existing elections reflected in 2026 reporting? For detailed comparisons, see the existing S-Corp and LLC Insights rather than duplicating the analysis.
6. Fixed Assets Can Affect Both Federal and California Results
Businesses that purchased equipment, vehicles, computers, machinery, or furniture during 2026 should ensure those are accurately reflected in the fixed-asset records. For 2026, the federal Section 179 expense limit increased to $2,560,000, with the phase-out beginning when qualifying property placed in service exceeds $4,090,000. But the federal result does not equal the California result — California maintains nonconformity in depreciation and Section 179 requiring separate state calculations. A year-end fixed-asset review should focus first on the facts: what was purchased, cost basis, date placed in service, business use, and disposals. See Fixed Asset Review & California Depreciation Planning 2026 and California Conformity & Nonconformity 2026.
7. Accurate Bookkeeping Is Part of Tax Planning
Tax planning is less reliable when the underlying data is incomplete. A small-business review may cover revenue (recorded sales, receivables, nonrecurring income), expenses (operating, payroll, insurance, professional fees), and balance-sheet items (bank and credit-card balances, receivables/payables, loans, fixed assets, owner equity). The goal is to improve the reliability of the 2026 business tax projection before year-end. See Bookkeeping Cleanup Before Year-End 2026.
8. Small Business Tax Planning 2026 at a Glance
| Planning area | Primary question |
|---|---|
| Federal changes | Do current projections reflect the federal rules applicable to 2026? |
| Estimated taxes | Do payments and withholding still align with projected income? |
| California PTE | Was the June 15 requirement met, and is any credit reduction relevant? |
| Entity records | Are payroll, distributions, and owner transactions documented correctly? |
| Fixed assets | Are 2026 additions and dispositions recorded with placed-in-service dates? |
| California adjustments | Are federal and California differences tracked separately? |
| Bookkeeping | Are the books complete enough to support a reliable projection? |
For business owners in Los Angeles, these rules are coordinated with the entity's actual structure and records — see the Small Business CPA in Los Angeles service page.
Compliance Resources and Tools
- IRS Publication 505 (2026) — federal estimated tax and 2026 QBID changes (accessed August 26, 2026).
- IRS Publication 946 — federal depreciation and 2026 Section 179 limits (accessed August 26, 2026).
- FTB 2026 Form 540-ES Instructions — California estimated-tax rules (accessed August 26, 2026).
- California Franchise Tax Board — Pass-Through Entity Elective Tax (2026–2030 rules) (accessed August 26, 2026).
- Small business tax planning 2026 should use current-year results and current-year rules, not only prior-year assumptions.
- Federal 2026 changes include updates to the QBI deduction framework and higher Section 179 limits.
- Estimated-tax planning coordinates business income with owner-level withholding and other income.
- California uses a 30% / 40% / 0% / 30% installment structure that differs from federal.
- California extended the PTE elective tax through 2030 and changed the consequence of missing the June 15 payment.
- Business-level books and owner-level projections are connected but separate.
- Accurate fixed-asset records, owner transactions, and reconciled books improve year-end projections.
References
- Internal Revenue Service. Publication 505 (2026), Tax Withholding and Estimated Tax. irs.gov/publications/p505 (accessed August 26, 2026).
- Internal Revenue Service. Publication 946, How To Depreciate Property. irs.gov/publications/p946 (accessed August 26, 2026).
- California Franchise Tax Board. 2026 Instructions for Form 540-ES. ftb.ca.gov (accessed August 26, 2026).
- California Franchise Tax Board. Pass-Through Entity Elective Tax. ftb.ca.gov (accessed August 26, 2026).
The information contained in this publication is provided for educational and general informational purposes only. It does not constitute tax advice, accounting advice, legal advice, or any other form of professional advice and does not create a client-professional relationship.
The content reflects tax law and regulations applicable on the date of publication only and is subject to change without notice. Examples and illustrations are hypothetical and do not represent any specific taxpayer situation. Past results or referenced positions do not guarantee future outcomes.
No reader should act or refrain from acting on the basis of this publication without first obtaining specific written advice from a licensed CPA based on the reader's individual facts and circumstances.
Any federal tax advice contained herein is not intended or written to be used, and cannot be used, for the purpose of avoiding penalties that may be imposed under the Internal Revenue Code.
Parsi Team Specific Notice: This publication was prepared by non-licensed content personnel under the direct supervision and final approval of a licensed CPA. The reviewing CPA assumes professional responsibility for the technical accuracy and compliance of the content. All other limitations stated in the disclaimer above remain fully applicable.