Electric vehicle purchase contracts share most features of traditional car dealer agreements — but they add a layer of complexity around the battery warranty, software updates, and federal tax credit eligibility that ICE vehicle buyers never face. The battery is the most expensive component of an EV (often 40–50% of the vehicle's value), and its warranty terms — including what percentage of capacity degradation triggers a replacement — are not always clearly set out in the dealer contract itself. Additionally, the Inflation Reduction Act's clean vehicle tax credit rules (up to $7,500 for new EVs, $4,000 for used) impose income limits, vehicle price caps, and manufacturer assembly requirements. Whether you qualify — and whether the dealer has represented that correctly — belongs in the purchase agreement.
What is a Dealer Warranty?
An electric vehicle purchase agreement is a sales contract between a dealership (or direct manufacturer, for brands like Tesla and Rivian that use direct sales) and a buyer, covering the vehicle price, trade-in valuation, financing terms, warranty coverage, add-on products (extended warranties, gap insurance, paint protection), federal tax credit assignment terms, and delivery conditions. For new EVs, the manufacturer's warranty is the primary coverage — dealers don't issue their own warranties on new vehicles. For used or certified pre-owned EVs, the dealer warranty and any remaining manufacturer warranty both apply.
Red flags to watch for
Most EV manufacturers warrant the battery against degradation below 70% of original capacity. Some offer 60%. A dealer contract that references 'battery warranty per manufacturer's terms' without stating the threshold gives you no enforceable benchmark for when a replacement claim is valid.
Under the IRA, dealers can transfer the EV tax credit at point of sale (advance payment). If eligibility is later disputed by the IRS — because the vehicle doesn't meet assembly requirements or your income exceeds the cap — some contracts place the repayment obligation on the buyer rather than the dealer.
Dealer-added products are frequently included in the finance total without clear itemisation. On EVs, extended warranty products are often redundant with the existing manufacturer warranty. Always request an itemised breakdown and reject any add-on you did not expressly agree to.
Some EV manufacturers retain the right to update vehicle software in ways that affect performance, range, or features. A contract that doesn't address this — or that incorporates manufacturer terms permitting feature modification — may leave you with fewer capabilities than you paid for.
Used EVs sold 'as is' come with no implied warranty. Without a written battery state-of-health report (typically available from a dealer's diagnostic tool), you have no baseline for a future degradation claim. Sellers who refuse to provide this should be treated as a red flag.
Manufacturers occasionally offer subsidised financing rates (e.g., 0.9% APR) that are separate from and better than dealer-arranged financing. Contracts that bundle both without clearly labelling which APR applies to your deal can obscure a worse-than-advertised rate.
Your legal rights
EV purchases in the US are governed by state lemon laws, which apply to EVs in the same manner as ICE vehicles — most require the manufacturer to repair a defect within a reasonable number of attempts or offer a replacement/refund. The Magnuson-Moss Warranty Act governs written warranties on vehicles sold in the US. The FTC's Used Car Rule requires dealers to display a Buyers Guide disclosing warranty coverage (or lack thereof) on all used vehicles. For tax credit eligibility, the IRS governs qualification under 26 U.S.C. § 30D (new clean vehicles) and § 25E (used clean vehicles) as modified by the Inflation Reduction Act 2022. State-specific protections may apply — California's Song-Beverly Consumer Warranty Act, for example, provides stronger lemon law protections and includes used vehicles within certain warranty periods.
Questions to ask before you sign
- 1What is the battery warranty term and what capacity degradation threshold triggers a replacement claim?
- 2Am I eligible for the federal EV tax credit, and has the dealer verified the vehicle meets the assembly and MSRP requirements?
- 3If the tax credit is transferred at point of sale and later disputed by the IRS, who bears the repayment obligation?
- 4What add-on products are included in the finance total, and can I see an itemised list with the cost of each?
- 5For used EVs: can you provide a battery state-of-health report from your diagnostic system?
- 6Does the manufacturer retain the right to modify vehicle features via software updates after purchase?
Disclaimer: This guide is for educational purposes only and does not constitute legal advice. Contract law varies by jurisdiction and individual circumstances. Always consult a qualified legal professional before making decisions based on this information.