Rancho Cucamonga, CA
From Complexity to Clarity
We're a team of accounting professionals who believe your CPA should be a growth partner, not just a compliance checkbox.
G&S Accountancy Inc. is a full-service CPA firm in Rancho Cucamonga, California led by AJ Singh, CPA, EA, enrolled to practice before the IRS. The firm's team specializes in construction, transportation and logistics, and nonprofit accounting, providing audit defense, tax planning, bookkeeping, and business advisory services throughout Southern California.
Certification
Enrolled to Practice Before the IRS
AJ Singh, CPA, EA, is enrolled to practice before the IRS and represents taxpayers at every administrative level of the IRS: audits, collections and appeals. That means G&S can handle every part of your case, from the first notice to the final resolution.
About us
Our Story
How a small tax practice grew into Southern California's go-to firm for construction, transportation, and nonprofit accounting.
Founded in Rancho Cucamonga, G&S Accountancy has grown from a small tax practice into a full-service CPA firm serving the Inland Empire and greater Southern California. From the beginning, the firm was built on a straightforward conviction: business owners deserve a CPA who is genuinely invested in their success - not just their filings.
The firm evolved from generalist accounting into focused industry specialization, recognizing that construction contractors, transportation operators, and nonprofit organizations each face unique financial challenges that demand deep expertise. Job costing, equipment depreciation, prevailing wage compliance, DOT regulations, grant management, Form 990 - these are not general knowledge. They require dedicated focus, and G&S built specialized teams to deliver exactly that.
Today, G&S combines industry-specialized knowledge with process automation and structured workflows to deliver proactive financial guidance. The firm operates on a simple principle: your CPA should be a year-round growth partner who understands your industry, not a seasonal service provider who processes forms and disappears until next April. That principle shapes every client relationship, every engagement structure, and every conversation we have.
Team
Our Team
Two partners. One team. One shared commitment to your success.
G&S Accountancy is led by Managing Partner AJ Singh, CPA, EA, enrolled to practice before the IRS, and Partner & CTO Neeraj Gupta, who architects the firm's CPA-led automation tools. Together with a team of senior accountants, auditors, tax resolution specialists, and compliance professionals, they deliver the expertise and structured processes that G&S clients rely on.
Meet the Full TeamAJ Singh
Managing Partner, CPA, EA
Enrolled to practice before the IRS, with 15+ years of experience leading audit defense, tax strategy, and client relationships.
Neeraj Gupta
Partner & Chief Technology Officer
20+ years in process automation and business systems. Architects G&S's workflow solutions for reconciliation, IFTA, document management, and ACA reporting.
Values
Our Values
The principles that shape every client relationship, every engagement, and every decision we make.
Industry Expertise
Deep knowledge of your specific industry's financial challenges, regulations, and growth opportunities. We don't dabble — we specialize.
Personalized Approach
Tailored services designed around your business needs, not one-size-fits-all solutions applied regardless of context.
Long-Term Partnership
We're your trusted advisor through every season of business. We invest in understanding your goals and growing with you over time.
Financial Empowerment
We help you navigate complexity, maximize your potential, and make confident financial decisions backed by expert guidance.
Our approach
How We Simplify Accounting and Compliance Work
G&S uses process automation and structured workflows to reduce manual accounting work, improve recurring close routines, and organize document and compliance workflows. The result is clearer process visibility, simpler communication, more organized records, faster turnaround, and more time for advice instead of administrative work.
Organized Workflows
Every engagement follows a structured process with clear milestones. You know where things stand without chasing updates.
Secure Document Exchange
One organized place for records, requests, and signatures. Less back-and-forth, fewer missing items, faster handoff.
Clearer Communication
Regular updates and walkthroughs on your schedule. Complex accounting topics explained clearly, without requiring extra meetings.
Less Manual Work
CPA-led process automation reduces repetitive tasks across bookkeeping, reconciliation, compliance, and document collection.
Get in touch
Ready to Simplify Your Finances?
Schedule a free consultation and find out how G&S can help your business grow.