California Research Tax Credit Glossary
Published Date: April 1, 2026 | Publisher: Swanson Reed
Quick Answer Capsule: California R&D Tax Credit Terms
This glossary defines critical terminology for the California Research Tax Credit, administered by the Franchise Tax Board (FTB). Key concepts include Qualified Research Expenses (QREs), Alternative Simplified Credit (ASC) methods, entity-level taxation, and state-specific gross receipts calculations. Understanding these definitions is essential for compliant R&D tax credit claims in California.
Glossary of Terms
| Glossary Term & Link | Definition |
|---|---|
| Franchise Tax Board (FTB) | California state agency responsible for administering personal and corporate income tax, including research credits. |
| Revenue and Taxation Code (R&TC) §17052.12 | California tax code section detailing the personal income tax credit for increasing qualified research expenses. |
| Revenue and Taxation Code (R&TC) §23609 | California tax code section outlining the corporation tax credit for increasing qualified research activities. |
| Qualified Research Expenses (QREs) | Costs eligible for the California research credit, including wages, supplies, and certain contract research expenses. |
| California Qualified Research | R&D activities conducted within California that meet specific statutory requirements for the state tax credit. |
| Research Activities Conducted Within California | Only research physically performed in California qualifies for the state’s R&D tax credit calculation rules. |
| Fixed-Base Percentage | The historical ratio of research expenses to gross receipts, used to calculate the base amount. |
| Base Amount | A calculated threshold of historical R&D spending that must be exceeded to claim the credit. |
| Average Annual Gross Receipts (for Base Amount) | The average of gross receipts from the four tax years preceding the current credit year. |
| California Gross Receipts Definition | Only gross receipts derived from the sale of property within California are included in calculations. |
| Gross Receipts from California Sales | Revenue specifically generated from sales of tangible or intangible property to California-based purchasers or entities. |
| Alternative Incremental Credit (AIC) | An alternative method for calculating the research credit using varying rates based on gross receipts. |
| AIC Base Amount | The specific base amount calculation required when a taxpayer elects the Alternative Incremental Credit method. |
| Election of AIC Method | The formal taxpayer choice to utilize the Alternative Incremental Credit calculation for a taxable year. |
| Revocation of AIC Election (FTB Consent) | Reversing the Alternative Incremental Credit election, which generally requires prior official consent from the FTB. |
| Alternative Simplified Credit (ASC) | A simplified credit calculation method based on recent QREs, available under California tax code legislation. |
| ASC Method for California (SB 711) | California’s version of the federal ASC, modifying how the research credit is calculated and claimed. |
| ASC Credit Rate (3%) | The statutory 3 percent percentage applied to eligible expenses when using California’s Alternative Simplified Credit. |
| Basic Research Payments | Amounts paid by corporations to qualified organizations for fundamental scientific research without immediate commercial objectives. |
| Basic Research Credit Rate (24%) | California allows a generous 24% credit rate for qualifying basic research payments to eligible organizations. |
| Qualified Organization (for Basic Research) | Universities and certain scientific research organizations eligible to receive qualifying basic research financial payments legally. |
| Nonrefundable Credit | A tax credit that can reduce state tax liability to zero but cannot generate refunds. |
| Indefinite Carryover/Carryforward | Unused California research credits can be carried forward indefinitely to offset future state tax liabilities. |
| Credit Carryback (Not Allowed) | Unlike certain federal regulations, California law does not permit carrying research credits back to prior years. |
| Reduced Credit Election (IRC §280C(c)) | An election to take a reduced research credit to avoid adjusting allowable state deduction amounts. |
| Credit Limitations ($5,000,000) | General California limits on R&D credit utilization, although specific rules and corporate exceptions frequently apply. |
| Refundable Credit Election (Credit Cap Disallowed) | Specific election conditions where certain credit caps might be bypassed or handled as refundable credits. |
| Five-Year Refundable Period | A defined timeframe during which certain qualified credits or elections must be utilized or refunded. |
| Minimum Franchise Tax ($800) | The baseline annual tax imposed on corporations doing business in California, regardless of income level. |
| Tax Below Tentative Minimum Tax (TMT) | Research credits generally cannot reduce a taxpayer’s California tax liability below their tentative minimum tax. |
| Corporate Income Tax (Rate 8.84%) | The standard California state income tax rate applied to C corporations operating within the state. |
| S Corporation Tax Rate (1.5%) | The California entity-level tax rate imposed on the net income of an S corporation. |
| S Corporation Entity-Level Credit (1/3 Rule) | S corporations can claim one-third of the generated research credit against their entity-level tax liability. |
| S Corporation Pass-Through (100%) | S corporations pass 100% of the generated research credit through to their individual shareholder returns. |
| Partnership Allocation | Research credits generated by a partnership are allocated to partners based on their distributive shares. |
| Disregarded Business Entity (SMLLC) | Single-member LLCs generally pass credits directly to the single owner for California tax purposes. |
| Sole Proprietorship Eligibility | Individuals operating as sole proprietors can claim the research credit on their personal California returns. |
| Form FTB 3523 (Research Credit) | The official California Franchise Tax Board form used to calculate and claim the research credit. |
| Election to Assign Credit | A choice allowing members of a California combined reporting group to share earned research credits. |
| Eligible Credit (for Assignment) | Only specific research credits earned in taxable years beginning after July 2008 can be assigned. |
| Eligible Assignee | An affiliated corporation within the same combined reporting group that receives assigned research tax credits. |
| Form FTB 3544 (Assignment of Credit) | The required FTB form used to report the assignment of research credits between affiliated members. |
| Combined Reporting Group | A group of affiliated corporations required to file a single, combined California franchise tax return. |
| Joint and Several Liability (Assignment) | Both assignor and assignee remain legally responsible for tax deficiencies related to assigned research credits. |
| Qualified Services (Wages) | Compensated activities, such as direct research or direct supervision, that qualify for the R&D credit. |
