Tax Accounting

Base is America’s next-generation power company. We’re rebuilding the foundation of modern civilization–electricity–by deploying a vast network of distributed batteries that is transforming today’s fragile, centralized grid into a resilient and abundant system. We are engineers, operators, and creatives solving some of the most complex, interdisciplinary challenges of our time.

The Tax Accountant role at Base will oversee and manage all aspects of the company’s tax compliance and reporting functions. This role will be responsible for preparing and reviewing various tax filings, ensuring adherence to federal, state, and local tax regulations, and developing strategies to optimize the company’s tax position. We are looking for a candidate with a strong technical background in corporate tax, exceptional attention to detail, and proven leadership skills.

What You'll Do

• Oversee the timely and accurate preparation and filing of all federal and state income and franchise tax returns across all legal entities.

• Manage the tax provision process (ASC 740), including current and deferred tax calculations, uncertain tax positions (FIN 48), and effective tax rate analysis.

• Serve as a key point of contact for external auditors and tax advisors on tax compliance, provision, and reporting matters.

• Direct the preparation and timely filing of all real and personal property tax returns across applicable jurisdictions.

• Manage the property tax assessment process, including reviewing appraisals, contesting valuations where appropriate, and ensuring timely payment of property tax liabilities.

• Lead the annual R&D tax credit study process by partnering with engineering, operations, and finance teams to identify qualifying activities and expenditures.

• Prepare and maintain documentation required to substantiate R&D tax credit claims in accordance with applicable tax law.

• Manage compliance for utility-based taxes, including sales and use tax, gross receipts tax, and other regulatory fees tied to utility services.

• Ensure accurate setup and ongoing maintenance of tax determination logic within billing and ERP systems for utility-related transactions.

• Support the calculation, compliance, and documentation of federal clean energy incentives, including Investment Tax Credit (ITC 48E) and Production Tax Credit (PTC 45X).

• Manage ongoing tax reporting and compliance for renewable energy assets, including partnership tax considerations and Subchapter K reporting for tax equity structures.

• Ensure compliance with eligibility requirements for renewable energy bonus credits, including prevailing wage, apprenticeship, domestic content, and energy community requirements.

• Act as the primary point of contact for federal, state, and local tax authority audits.

• Research complex tax issues, document tax positions, and monitor legislative and regulatory developments impacting the company, recommending actions as needed.

• Continuously identify opportunities to streamline, automate, and improve tax compliance and reporting processes through technology and system enhancements.

What You'll Bring

• Bachelor’s degree in Accounting, Finance, or a related field.

• Certified Public Accountant (CPA) preferred.

• 5–7+ years of experience in corporate tax, public accounting, or a combination of both.

• Strong knowledge of federal and state income tax, property tax, R&D tax credits, and utility-based tax compliance.

• Experience supporting companies in renewable energy, utilities, and/or manufacturing environments.

• Hands-on experience with tax preparation software, ERP systems, and the Microsoft Suite.

• Demonstrated ability to manage complex projects, mentor peers, and clearly communicate technical tax concepts to non-tax stakeholders.

• First Principles Thinking: Question assumptions. Principles > rules.

• Operate at Base Pace: Focus on what matters, act quickly, and learn by doing.

• Give & Get Feedback: Be direct, be humble, and maintain a growth mindset.

• Everyone’s an Owner: Follow through on commitments and own results.

• Strong Opinions, Loosely Held: Drive clarity and make calls with imperfect information.

• Committed to the Mission: Rebuilding the grid is a big challenge. We work hard because we care deeply about the impact we’re creating. We work in-person. It’s not a 9-to-5. We are all-in.

• Fun & Optimism Coexist with Grit: Collaboration and celebration coincide with the intensity of building real things.