This page provides a complete, step-by-step R&D tax credit example calculation. It is intended to be one of the most useful pages on the site for understanding how the pieces fit together.
ILLUSTRATIVE EXAMPLE — NOT A TAX RESULT OR FILING RECOMMENDATION.
The following is a hypothetical illustration for educational purposes only. It does not represent any actual taxpayer, does not calculate a personalized tax result, and does not state a filing recommendation. All numbers are hypothetical and labeled as such.
The Hypothetical Business
Suppose a hypothetical company has the following cost components for the current year, all connected to qualified research activities that meet the requirements of Section 41:
Step 1: Qualified Wage Amount
| Component | Amount | |---|---| | Qualified wages (after qualified-service allocation) | $400,000 |
The company has identified employees who performed or directly supported qualified research. After allocating wages to qualified services (direct research, direct supervision, direct support) based on time and activity records, the qualified wage amount is $400,000. For more, see our page on R&D tax credit employee wages.
Step 2: Qualified Contractor Payments
| Component | Amount | |---|---| | Contract research payments (qualifying) | $100,000 | | 65% inclusion | × 65% | | Contract research QRE | $65,000 |
The company paid $100,000 to an outside firm for qualifying contract research (where the company bears the economic risk and retains substantial rights). Under Section 41(b)(3)(A), only 65% of qualifying contract research payments are included in QREs. For more, see our page on R&D tax credit contractor costs.
Step 3: Qualifying Supplies
| Component | Amount | |---|---| | Supplies consumed in qualified research | $35,000 |
The company consumed $35,000 in supplies (tangible property other than land and depreciable property) in the conduct of qualified research. For more, see our page on R&D tax credit supplies.
Step 4: Total QREs
| Component | Amount | |---|---| | Qualified wages | $400,000 | | Contract research QRE (65% of $100,000) | $65,000 | | Supplies | $35,000 | | Total QREs | $500,000 |
Total QRE = $400,000 + $65,000 + $35,000 = $500,000
Step 5: Prior Three-Year QREs
| Period | QREs | |---|---| | 3 years preceding (Year 1) | $300,000 | | 2 years preceding (Year 2) | $350,000 | | 1 year preceding (Year 3) | $400,000 |
Step 6: Selected Calculation Method — ASC
The company elects the ASC method.
ASC Calculation
Step 6a: Compute the prior 3-year average.
Average = ($300,000 + $350,000 + $400,000) / 3 = $1,050,000 / 3 = $350,000
Step 6b: Compute 50% of the average.
50% × $350,000 = $175,000
Step 6c: Compute the excess.
Excess = $500,000 − $175,000 = $325,000
Step 6d: Apply the 14% rate.
Tentative ASC = 14% × $325,000 = $45,500
Step 7: Tentative Research Credit
The tentative research credit under the ASC method is $45,500. This is the gross credit before any elections (such as Section 280C) or limitations (such as the general business credit limitation under Section 38). For more, see our page on whether the R&D credit reduces taxes owed.
What Would Change If Prior QRE History Changed
Suppose the prior three-year QREs were lower:
| Period | QREs | |---|---| | 3 years preceding (Year 1) | $100,000 | | 2 years preceding (Year 2) | $100,000 | | 1 year preceding (Year 3) | $100,000 |
Average = ($100,000 + $100,000 + $100,000) / 3 = $100,000 50% × $100,000 = $50,000 Excess = $500,000 − $50,000 = $450,000 ASC = 14% × $450,000 = $63,000
With a lower prior average, the comparison amount is lower, the excess is higher, and the credit is larger ($63,000 vs. $45,500).
What Would Change If QREs Increased
Suppose current-year QREs increased to $700,000, with the same prior three-year average ($350,000):
50% × $350,000 = $175,000 Excess = $700,000 − $175,000 = $525,000 ASC = 14% × $525,000 = $73,500
With higher current QREs, the excess is higher, and the credit is larger ($73,500 vs. $45,500).
What Would Change If There Were No Prior QREs
Suppose the company had no QREs in any one of the three preceding years. The 6% rule under Section 41(c)(4)(B) applies:
Tentative ASC = 6% × $500,000 = $30,000
With no prior QREs, the 6% rate applies directly to current QREs, producing a lower credit ($30,000 vs. $45,500) than the general 14% formula in the original example. Note: this 6% special rule applies whenever any one of the three preceding years has zero QREs — not only when all three years are zero. For example, if the company had QREs of $300,000 in Year 1, $0 in Year 2, and $400,000 in Year 3, the 6% rule would still apply because Year 2 has zero QREs. For more, see our page on no prior QREs.
Regular Method Comparison
For comparison, suppose the company is a start-up (3% fixed-base percentage for the first 5 applicable post-1993 years) with average annual gross receipts of $2,000,000 for the four preceding years:
Base amount = 3% × $2,000,000 = $60,000 Minimum base = 50% × $500,000 = $250,000 Since $60,000 < $250,000, use $250,000 Excess = $500,000 − $250,000 = $250,000 Regular credit = 20% × $250,000 = $50,000
In this hypothetical example, the regular method produces a larger tentative credit ($50,000) than the ASC ($45,500). But this is just one set of facts — different inputs could produce a different result. For more, see our page on ASC vs. regular.
Important Caveats
- This example does not apply owner-level tax limitations. The tentative credit is the gross credit before the general business credit limitation and other rules.
- This example does not consider the Section 280C election, which could affect the overall economics.
- This example uses hypothetical numbers. Actual results depend on the specific facts.
- This example does not constitute a filing recommendation. Professional tax review is appropriate.
Documentation Behind the Numbers
Every input in this example must be supportable: wage allocations, contractor agreements and the 65% inclusion, supply records, prior-year QRE workpapers, and (for the regular method) gross-receipts records. For more, see our page on R&D tax credit documentation.
Key Takeaway
This step-by-step example shows how qualified wages, contractor costs (at 65%), and supplies combine into total QREs, how total QREs feed into the ASC and regular methods, and how changes in prior QRE history, current QREs, or the no-prior-QRE rule affect the result. The example is illustrative and does not constitute a filing recommendation. Because actual results depend on specific facts, professional tax review is appropriate. For the calculation overview, see our page on how the R&D tax credit is calculated.