What is the current CSCF value?

Per the Commission's own CBAM Guidance No. 4 (published 14 August 2026), Table 2-1 sets CSCF = 1.0 for every year from 2026 through 2034. Values for 2031 onward remain formally preliminary pending a further Commission publication.

If CSCF is 1.0, does it actually change the calculation?

Not numerically, today — multiplying by 1.0 doesn't change the result. But a calculation engine that hardcodes the formula without the CSCF term is still structurally wrong: if a future Commission decision sets CSCF to something other than 1.0 for a later year, an engine missing the multiplier entirely would silently produce a wrong result with no code change ever flagged as needed.

Does CSCF apply to CBAM importers, or only to EU ETS domestic producers?

It applies to CBAM importers too. CSCF is wired into the same benchmark-credit calculation that determines the importer-facing certificate obligation — not a domestic-only EU ETS concept that stops at the EU border.

Annex Eq. 2/6 · Commission CBAM Guidance No. 4, 14 Aug 2026

CSCF: the multiplier that's easy to leave out — and shouldn't be

The Cross-Sectoral Correction Factor scales the free-allocation benchmark credit. It's currently 1.0 for every CBAM year — but that doesn't make it optional to include in the formula.

By Sridhar Mothe · Founder, CarbonAtlas

Last verified: 02 September 2026

Where CSCF sits in the formula

The CBAM free-allocation benchmark credit isn't just "CBAM factor × Benchmark" — the Annex's own Equation 2 (Column A) and Equation 6 (Column B) both define it with a third term:

Benchmark credit = CBAM factor × CSCF × Benchmark value

Leaving CSCF out of a calculation engine — rather than including it and letting it equal 1.0 where that's the correct value — means the formula is only accidentally correct for as long as CSCF happens to stay at 1.0.

The current value

Per the Commission's own CBAM Guidance No. 4 ("CBAM calculation of the free allocation adjustment to the number of CBAM certificates to be surrendered", published 14 August 2026), Table 2-1 sets:

Years	CSCF value	Status
2026 – 2030	1.0 (100%)	Confirmed
2031 – 2034	1.0 (100%)	Formally preliminary — pending further Commission publication

The value comes from Commission Implementing Decision (EU) 2026/1862. Because it's 1.0 across the board right now, its presence or absence in a calculation doesn't currently change any output — which is exactly why it's easy to miss during implementation, and why it stayed wrong in more than one place before being caught.

A real correction history, not a hypothetical

This isn't a theoretical edge case — it's a bug we found and fixed twice in our own calculation engine:

First: CSCF was excluded from the benchmark-credit formula entirely, based on an incorrect assumption that it applied only to domestic EU ETS producers, not CBAM importers. A direct read of the Annex's own equations showed CSCF multiplying into the exact term that determines the importer-facing credit — it was added back in.
Second, separately: once CSCF was correctly included, the value used for it was wrong (0.9099, not 1.0). Verified and corrected against the Commission's CBAM Guidance No. 4 directly, not a secondary summary of it.

Both corrections matter for the same reason: a formula that's "close enough" because a missing or wrong term happens to have a small effect this year is still a defect — it's only a matter of when the value changes enough to matter.

Frequently asked questions

A uniform correction applied across EU ETS benchmark sectors (Commission Implementing Decision (EU) 2026/1862) that scales the free-allocation benchmark credit in the CBAM obligation formula — Annex Equation 2 (Column A) and Equation 6 (Column B) both define the free-allocation term as CBAM_factor × CSCF × Benchmark.

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