Your 45V credit turns on a verified carbon intensity.
The 45V clean-hydrogen credit is worth up to $3.00/kg — and the tier turns on your hydrogen’s lifecycle carbon intensity. Model it in CarbonSig and get it verified by an independent third party, in the platform.
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$3.00 Verified CI
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$1.75
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$1.00
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$0.60
Tier set by lifecycle carbon intensity (kg CO₂e/kg H₂).
Who verifies a 45V hydrogen carbon intensity, and what gets verified?
An independent third party verifies the hydrogen’s lifecycle carbon intensity (kg CO₂e/kg H₂), and that number sets the credit tier — up to $3.00/kg. In CarbonSig a producer models the pathway and an independent, accredited verifier reviews it in the Verifier Hub. CarbonSig hosts the workspace; it does not issue the credit.
A self-attested number does not set your tier.
Self-attested carbon intensity
A number you calculated yourself
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Does not set your 45V tier on its own.
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The credit’s value is exposed if the number can’t be defended.
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45V pays on a verified lifecycle intensity, not an attestation.
Third-party verified carbon intensity
Reviewed by an independent verifier
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Sets the tier the credit pays on — up to $3.00/kg.
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A defensible carbon intensity, reviewed node by node.
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An independent third party has verified the lifecycle intensity.
Model the carbon intensity, then get it third-party verified — in one platform.
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Step 1
Model the production pathway
Build your hydrogen pathway in the System Builder — every input, process and emission source as a node.
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Step 2
Analyze the carbon intensity
Analyze computes the net carbon intensity from the model: Net Emission = Sources − Sinks − Credits.
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Step 3
Register & verify, round by round
Register the model and an independent, accredited verifier reviews it round by round in the Verifier Hub, through to “Verified on CarbonSig.”
Built for ammonia and clean-hydrogen producers.
US DOE — 45V ammonia
Full hydrogen intensity pathway, modelled on CarbonSig.
A real 45V ammonia pathway, modelled end to end
A US DOE 45V ammonia qualification analysis modelled the full hydrogen intensity pathway on CarbonSig — from hydrogen production through ammonia synthesis to a lifecycle carbon intensity a verifier can review.
One model, more than one scheme.
The same lifecycle model that evidences your 45V carbon intensity also supports CORSIA / LCAF — lifecycle gCO₂e/MJ, with about a 10% reduction to qualify.
See all standardsA verified carbon intensity — and the tier that rides on it.
Get your hydrogen’s carbon intensity independently verified and you reach the tier the credit pays on. The 45V program is worth up to $3.00/kg, with $7.2 billion allocated.
Facilities placed in service after January 2028 no longer qualify — the window to model and verify a qualifying carbon intensity is closing.
45V, answered.
Who verifies a 45V hydrogen carbon intensity, and what gets verified?
An independent, accredited third party verifies your hydrogen’s lifecycle carbon intensity (kg CO₂e/kg H₂), and that verified intensity sets the credit tier — up to $3.00/kg. In CarbonSig you model the production pathway and an independent verifier reviews it round by round in the Verifier Hub. CarbonSig hosts the workspace; it does not issue the credit.
How much is the 45V credit worth?
The 45V clean-hydrogen credit is worth up to $3.00/kg of hydrogen, across four tiers set by the verified lifecycle carbon intensity — $0.60, $1.00, $1.75 and $3.00 per kg H₂. In total, $7.2 billion has been allocated to the program.
Is there a deadline for 45V?
Yes. Facilities placed in service after January 2028 no longer qualify for the 45V credit, so the window to model and verify a qualifying carbon intensity is closing.
Does CarbonSig issue the 45V credit?
No. CarbonSig is where you model your hydrogen’s carbon intensity and get it independently, third-party verified — a self-attested number does not set your tier. The credit itself is claimed through the IRS on the strength of an accredited verifier’s report.
Turn your carbon intensity into a verified 45V tier.
Model your hydrogen pathway, get it third-party verified in the platform, and reach the tier the credit pays on.