$115 million. That is the valuation Rivian wants Illinois to place on its electric vehicle plant — a figure the company has formally requested from state authorities, according to a report by eletric-vehicles.com.

The request puts Rivian at odds with the current assessed value of the manufacturing site. A lower valuation would reduce the property tax burden the EV maker carries on the facility, easing operating costs at a plant that anchors its production footprint in the Midwest.

Rivian builds its full model range at the Illinois site. The R1T pickup, the R1S SUV and the commercial delivery vans it supplies to Amazon all roll off lines there. The plant is the company's only high-volume assembly operation, which makes every cost line attached to the facility — labor, energy, logistics, and above all taxes — material to its margin structure.

The dispute now sits with Illinois state authorities, who must decide whether to accept the reduced valuation. The outcome will determine what Rivian pays in property taxes going forward and could set a reference point for how other manufacturers in the state argue their own assessments.

For a company still working toward sustained profitability, the move reads as a straightforward cost-reduction play. Property tax appeals of this kind are common among automakers with large physical footprints, particularly when production volumes or market conditions shift the economics of a site. What makes Rivian's case notable is the scale gap between the requested figure and the plant's role as the company's sole production hub.

The request also lands at a sensitive moment for EV manufacturing economics. Industry-wide demand growth has been uneven, and several manufacturers have recalibrated capacity plans, hiring timelines and capital spending over the past two years. Against that backdrop, local tax treatment of plant assets has become a live negotiation point between OEMs and the states that host them.

Illinois has an interest on both sides of the ledger. The state benefits from the jobs and supplier activity the plant generates, but a valuation cut directly reduces the tax revenue flowing to local taxing bodies around the facility. School districts, municipalities and counties that draw revenue from the plant's assessment are the parties most exposed to a downward revision.

Rivian has not publicly detailed the methodology behind its $115 million figure, and eletric-vehicles.com's report does not specify the current assessed valuation the company is contesting. That gap matters: the size of the tax reduction at stake depends entirely on how far the existing assessment sits above the requested number.

State authorities have not indicated a timeline for a decision.

What to watch next: whether Illinois accepts, rejects or negotiates the $115 million figure; the current assessed valuation once it surfaces in public records; and any response from local taxing districts that would absorb the revenue loss. A ruling in Rivian's favor would also signal to other manufacturers with Illinois operations that assessment challenges are a viable lever on plant costs.