If your California tax bill looks different from what you expected after filing your federal return, the gap is usually not an error. California updates its conformity to federal tax law on its own schedule, and for several major provisions it has chosen not to conform at all. The same business ends up with different taxable income figures on its federal and California returns.
This article covers the California-federal differences that affect contractors, LLC owners, restaurant owners, and self-employed individuals in Southeast LA County most often in 2026, and what those differences mean for your bookkeeping records.
Disclaimer: This is general bookkeeping guidance, not tax advice. California and federal tax calculations depend on your specific business structure, income, and filing status. Consult a CPA for advice specific to your situation.
Why California and Federal Business Taxes Differ
California taxes are not a state-level mirror of your federal return. The state legislature decides independently which federal tax law changes to adopt and does not always follow federal updates quickly or completely.
In October 2025, California enacted SB 711, updating the state's IRC conformity date from January 1, 2015 to January 1, 2025. That closes some gaps but preserves several important non-conformities. For SE LA small business owners, the most consequential are the QBI deduction, bonus depreciation, and certain business meal deduction rules.
The practical consequence: your CPA is calculating two genuinely different taxable income numbers for the same business, one for the IRS and one for the FTB. That is not a mistake. It reflects California tax conformity rules in 2026. Your bookkeeping records need to support both calculations.
The QBI Deduction: California Does Not Conform
One of the most significant ongoing non-conformities is the Qualified Business Income deduction under IRC Section 199A. Federally, eligible pass-through business owners (sole proprietors, partnerships, LLCs taxed as pass-throughs, and S-corps) can deduct up to 20% of their qualified business income, increasing to 23% starting in 2026 under recently extended legislation.
California does not conform to IRC Section 199A. The state taxes the same pass-through income at the full California personal income tax rate. No equivalent QBI deduction applies on your California return.
For a sole proprietor or LLC owner in SE LA with $120,000 in net business income, the federal QBI deduction reduces federal taxable income by $27,600 (23% of $120,000). California taxes the entire $120,000. That gap is not going to close until California chooses to conform, which it has not done. For a full explanation of how the deduction works and the 2026 rate, see the QBI deduction 2026 California guide. LLC owners can also see the California LLC bookkeeping requirements guide for how the non-conformity affects recordkeeping alongside the LLC fee and franchise tax.
From a bookkeeping standpoint, what matters is that your net profit figure is accurate. The federal QBI deduction is calculated from that figure, and errors in net profit produce an incorrect deduction. Clean, well-categorized books are the foundation the calculation rests on.
Bonus Depreciation: California Has Its Own Schedule
When a contractor, restaurant owner, or trade business in California buys equipment or machinery, the federal return and the California return use different depreciation rules. This is one of the areas where the California-federal gap creates the largest dollar difference for SE LA business owners.
Under the Tax Cuts and Jobs Act, federal law introduced "bonus depreciation," which is the ability to deduct a large portion of an asset's cost in the year it is placed in service rather than spreading the deduction over the asset's useful life. The federal bonus depreciation rate has changed under recent legislation; confirm the current rate with your CPA before filing, since Congress has modified the schedule multiple times and the applicable percentage for your assets depends on when they were placed in service and what legislation was in effect.
California has not adopted federal bonus depreciation, regardless of the federal rate in a given year. California follows standard MACRS depreciation without the bonus, which means asset costs are recovered over the standard useful life, typically five years for most equipment and seven years for others. The front-loaded federal deduction does not exist on the California return.
Practical example for SE LA contractors: a contractor who buys a $60,000 work truck in 2026 can claim federal bonus depreciation in year one (the exact dollar amount depends on the current federal rate -- confirm with your CPA). On the California return there is no bonus deduction at all. The first-year California deduction is based on standard MACRS depreciation only, and the remaining cost is recovered over the standard recovery period. The federal and California deductions diverge from the year of purchase forward, creating two separate depreciation schedules your CPA must maintain.
The bookkeeping implication: if your business buys significant equipment, your records need to track depreciation separately for federal and California purposes. A single depreciation schedule in QuickBooks will not capture both. Your CPA will typically maintain a separate state depreciation workpaper, but the underlying cost basis, acquisition date, and asset classification need to be recorded accurately from the start. See the contractor bookkeeping California guide for a detailed look at how this affects construction and trade businesses.
Business Meal Deductions: A State-Federal Gap Worth Flagging
Federal law allows a 50% deduction for ordinary and necessary business meals with a business purpose. California does not fully conform to the federal meal deduction rules as updated under the TCJA and subsequent legislation. Depending on the meal type and year, California's treatment can differ in ways that create a state-federal difference in the meals and entertainment category.
Verify specific treatment with a CPA rather than assume conformity. What the bookkeeping records need to support is the standard requirement: date, amount, business purpose, and who was present. Without that documentation, neither the federal nor the California deduction survives scrutiny. Keep receipts with the business purpose written on them, and let your CPA determine which rate applies on each return.
What This Means for Your Bookkeeping Records
The California-federal conformity gap creates a specific record-keeping requirement. Businesses with bonus depreciation differences, QBI implications, or meals deductions need records that support two separate tax schedules from the same underlying books.
In practical terms for QuickBooks users:
- Depreciation: Your CPA tracks federal and state depreciation separately. Your records need to clearly identify each asset by acquisition date and cost basis. Assets lumped into a single "equipment" entry without detail create reconstruction work at tax time.
- QBI: The federal QBI deduction is calculated from your net profit figure. Miscategorized income or expenses that distort net profit flow directly into an incorrect QBI calculation. Accurate books are the input the deduction is built from.
- Meals: Keep receipts with business purpose documented at the time of the meal. Your CPA applies the applicable federal and California rates. Undocumented meal expenses are at risk on both returns regardless of which rate applies.
If your books are behind or have not been reviewed for these categories, a catch-up engagement will identify the gaps before your CPA hits them at filing time. See the catch-up bookkeeping page for what that process looks like.
SE LA Small Business Owners Most Affected
The California-federal conformity gap hits harder for business types that are common in Southeast LA County, because these are the businesses with the largest deduction differences between the two returns.
Contractors and construction businesses make large equipment purchases where the bonus depreciation difference creates the biggest dollar gap between federal and California. A contractor buying trucks, tools, or heavy equipment in 2026 will have a materially different first-year deduction on each return, and that difference needs to be tracked from the date of purchase.
Restaurant owners face the bonus depreciation issue on equipment and kitchen buildouts, and uncertainty around how California treats certain qualified improvement property. Large remodel costs or equipment replacements need to be documented with detail (date placed in service, cost, asset description) so your CPA can apply the correct treatment on each return.
LLC owners with pass-through income will see federal and California taxable income differ by design because of the QBI non-conformity. The gap between the two tax bills reflects the California conformity decision, not a miscalculation. Accurate underlying books are what let your CPA calculate both numbers correctly and explain the difference.
Bilingual service is available. Consultations and records review are in English and Spanish.
Getting Your Books in Order for Both Returns
If your California and federal returns look significantly different and you are not sure whether the gap is correct or an error, the starting point is clean, well-organized books that your CPA can work from. J.P Bookkeeping organizes records so that state and federal depreciation differences are documented, QBI income figures are accurate, and your CPA can calculate both returns without reconstructing what your books should have captured in the first place.
J.P Bookkeeping works with contractors, LLC owners, restaurant owners, and self-employed individuals in Downey, Norwalk, Compton, Paramount, Lynwood, and Bellflower. Services are available in English and Spanish. Book a free 30-minute consultation at jpbookkeepingbusiness.com/appointments or call (323) 816-0517. If your books need catch-up work first, the catch-up bookkeeping page covers what that process looks like.
Disclaimer: J.P Bookkeeping is a bookkeeping firm, not a CPA or law firm. For tax planning, legal questions, or regulatory compliance, consult a licensed CPA or attorney. Information reflects publicly available requirements as of June 8, 2026. Confirm current IRS rates and thresholds at irs.gov and ftb.ca.gov before filing.