What Our Clients Say
Jamie, Nest Home Staging + Design
"We've worked with Soni for several years, and her unmatched attention to detail, strong work ethic, and integrity have made her an invaluable part of our team. She consistently provides insightful feedback and support, and I highly recommend her services."
Who We Are
At S Kastner Consulting, we are trusted accounting experts delivering high-quality virtual controller & vCFO services, data cleanup, and bookkeeping solutions. We are dedicated to empowering women-owned businesses, minority-owned businesses, and nonprofits with the financial clarity and confidence needed to thrive.
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With over 20 years of industry experience, we understand the unique challenges faced by mission-driven and underrepresented organizations. We don’t just manage your numbers — we translate them into strategic insights that drive sustainable growth. Our commitment is to excellence, accuracy, and transparency in every detail, so you can focus on leading your organization with confidence.
Our Story
S Kastner Consulting was built on a simple but powerful mission: that small business owners and nonprofit leaders deserve to feel confident and in control of their finances.
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After spending years working side by side with passionate small business owners and nonprofit leaders, we saw a common theme — financial stress and confusion were getting in the way of the bigger mission. It wasn’t about a lack of dedication; it was about not having the right support.
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That’s why we started S Kastner Consulting — to offer expert accounting guidance in a way that feels approachable, empowering, and aligned with your goals. We’re here to demystify the numbers, clean up the chaos, and help you make financial decisions that move your mission forward.
Our Mission & Values
Mission: To provide businesses and nonprofits with the financial clarity and strategic insights they need to grow and succeed.
Values:
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✔ Transparency – We believe trust starts with clear, open, and honest communication — always. ​
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✔ Integrity – We do what’s right, stay true to our word, and ensure full compliance every step of the way.
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✔ Growth – Your growth is our mission. We’re here to help you build, scale, and thrive.
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✔ Diversity – We celebrate diverse backgrounds, skills, and ideas — because different perspectives drive better results.
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✔ Ease – We take the stress out of finances, bringing clarity and confidence to every client experience.
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✔ Fun – We love what we do, and it shows. When you work with us, you’ll feel the positive energy every step of the way.
Meet The Founder
Soni Kastner
CEO & Chief Financial Strategist
With over 20 years of experience in financial management across industries including corporate, nonprofit, education, manufacturing, and outsourced accounting, Soni Kastner brings a deep and versatile perspective to her role as the founder of S Kastner Consulting, LLC.
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Soni is passionate about turning financial challenges into strategic opportunities. Her career has been defined by a commitment to financial clarity, compliance, and sustainable growth. As a seasoned financial strategist and trusted advisor, she works closely with women-owned businesses, minority-owned businesses, and nonprofits to help them make empowered financial decisions.
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Her approach is rooted in collaboration, education, and transparency—ensuring her clients not only understand their numbers but also use them as a roadmap for growth and impact. Through S Kastner Consulting, Soni continues to advocate for financial confidence and equity in entrepreneurship and leadership.
Who We Serve
We work with passionate small business owners and nonprofit leaders who are ready to take charge of their finances and build a sustainable future.
If you’re a woman or minority business owner or lead a nonprofit organization looking for financial clarity and strategic guidance, we’re here to help.
How We Help
We go beyond traditional bookkeeping—we serve as your financial partner, offering strategic insights and financial management solutions tailored to your unique needs.
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Whether it’s maintaining accurate records, optimizing cash flow, or providing CFO-level guidance, we help you focus on what you do best: running your business and making an impact.