How the 45Q Credit Works
Eligibility
Facility must meet minimum annual capture thresholds (18,750 MT/yr for power plants; 12,500 MT/yr for industrial; 1,000 MT/yr for DAC) and begin construction after August 16, 2022 for post-IRA rates.
Calculation
Credit = tons captured × applicable rate ($85 geologic, $60 utilization, $180 DAC). Prevailing wage and apprenticeship required for full rates; non-compliant projects receive ~20% of the above amounts.
Claim
File Form 8933 (Carbon Oxide Sequestration Credit) annually for up to 12 years. Credits are transferable or available as direct pay for nonprofits and governments.
Credit Rates Post-IRA
| Disposition Type | Pre-IRA Rate | Post-IRA Rate | DAC (Post-IRA) |
|---|---|---|---|
| Geologic Storage | $50/ton | $85/ton | $180/ton |
| EOR (Monitored) | $35/ton | $60/ton | $130/ton |
| Other Utilization | $35/ton | $60/ton | $130/ton |
Note: Post-IRA rates apply to facilities that begin construction after August 16, 2022. Prevailing wage and apprenticeship compliance is required to receive the above rates; without compliance the rates are approximately 20% of these amounts.
Capture Thresholds — IRA Expansion
One of the IRA's most impactful changes was drastically lowering the minimum annual capture thresholds that make a facility eligible for 45Q credits, opening the program to a much wider range of industrial emitters.
| Facility Type | Pre-IRA Threshold | Post-IRA Threshold | Reduction |
|---|---|---|---|
| Electric Generating | 500,000 MT/yr | 18,750 MT/yr | -96% |
| Industrial Emitter | 100,000 MT/yr | 12,500 MT/yr | -87% |
| Direct Air Capture | 100,000 MT/yr | 1,000 MT/yr | -99% |
Example Calculation
Assumes prevailing wage compliance and consistent annual capture. Subject to MRV verification and recapture rules. Consult a tax advisor before filing.
Recapture Rules & MRV Requirements
Section 45Q includes recapture provisions to ensure CO2 remains permanently stored. If credited CO2 leaks or is otherwise released, previously claimed credits must be repaid to the IRS.
Recapture Period
- 5-year recapture window post-storage
- Annual monitoring reports required
- EPA Underground Injection Control compliance
- Third-party verification often required
MRV Requirements
- Measurement, Reporting & Verification plan
- Annual CO2 injection and storage reporting
- EPA Greenhouse Gas Reporting Program compliance
- Site characterization and integrity monitoring
Recapture Insurance: Some project developers purchase geological risk insurance to protect against recapture liability. This cost should be modeled as part of the project's overall economics.
Stack 45Q with Compatible Programs
CFO Checklist
- 01Confirm facility type and annual capture volume meets the applicable minimum threshold
- 02Establish construction-begin date — post-August 16, 2022 projects receive the higher post-IRA rates
- 03Document prevailing wage and apprenticeship compliance for full credit rates
- 04Prepare MRV (Monitoring, Reporting & Verification) plan before the credit period begins
- 05File Form 8933 (Carbon Oxide Sequestration Credit) for each year of the 12-year credit window
Frequently Asked Questions
What is the 45Q credit rate for carbon capture?
Post-IRA rates (for facilities beginning construction after 2022): $85/ton for geologic storage, $60/ton for utilization (EOR with monitoring, concrete mineralization), and $180/ton for direct air capture with geologic storage. These rates are roughly double the pre-IRA amounts.
What are the capture threshold requirements for 45Q?
The IRA significantly lowered capture thresholds. Electric generating facilities must capture at least 18,750 metric tons/year (down from 500,000). Industrial facilities must capture at least 12,500 metric tons/year (down from 100,000). Direct air capture facilities must capture at least 1,000 metric tons/year.
How long can 45Q credits be claimed?
Credits are earned for 12 years from the date the carbon capture equipment is placed in service, or from January 1, 2023, whichever is later. The 12-year credit window was extended from the original provision by the IRA.
What is recapture under Section 45Q?
If CO2 that was stored and credited leaks back into the atmosphere, the taxpayer must repay (recapture) previously claimed credits. The recapture period is generally 5 years. Robust monitoring, reporting, and verification (MRV) plans are required to manage recapture risk.
Can 45Q be transferred or sold?
Yes. The IRA made 45Q credits transferable to unrelated third parties. Nonprofit organizations and government entities can elect direct pay. This significantly improves the monetization options for carbon capture project developers who may not have sufficient tax appetite.
Can 45Q stack with the ITC?
45Q is compatible with the ITC when the CCS system is a separate piece of equipment from the energy generation system. This is a common structure for power plants that add carbon capture alongside clean energy equipment.