Fractional Controller Services
BooksClose gives growing businesses and startups a controller-level finance function: a clean, reliable month-end close, audit-ready books, strong internal controls, and the technical accounting expertise that keeps you out of trouble.
Founder-led by Stan Tronik, CPA · 20+ years of corporate accounting leadership · Los Angeles & remote nationwide.
What We Do
Most growing companies don’t need a full-time controller—they need the expertise. We deliver senior oversight, a dependable close, and the financial discipline that makes your numbers trustworthy and your business fundable.
Senior financial leadership on a flexible basis—the expertise of a full-time controller at a fraction of the cost.
A disciplined close that produces dependable numbers—and books that stand up when auditors arrive.
The structure behind reliable financials—controls and procedures that reduce errors and fraud risk.
Clear, defensible documentation of the technical positions auditors and leadership rely on.
Ready to build in-house? We help you hire, train, and onboard the right accounting team—domestic and international.
The accurate, current foundation everything else depends on—including catch-up when you’ve fallen behind.
Why a Controller
If a few of these sound familiar, your accounting has likely outgrown what bookkeeping alone can support.
“A bookkeeper records what happened. A controller makes sure it’s right, explains what it means, and builds the discipline to keep it that way.”
GAAP-compliant financials, stronger controls that reduce errors and fraud risk, dependable reporting, and the strategic support you need during growth, an audit, or a capital raise—so you can make decisions on solid, accurate data.
The Difference
Good decisions depend on good data. A disciplined close is where accuracy is built—every account reviewed, every reconciliation tied out, every surprise caught early.
Expenses that belong on the balance sheet skew the P&L. Aging AR and AP slip past 90 days unnoticed. Reconciliations go unreviewed, and reporting becomes reactive—leaving leadership to make major decisions on numbers they can’t fully trust.
Every account is reviewed and reconciled, costs are categorized and capitalized correctly, and AR/AP is actively managed to protect cash flow. You get real-time, accurate financials—and a proactive partner who flags issues before they become problems.
About BooksClose
BooksClose was founded by Stan Tronik, a CPA and corporate controller with more than twenty years of progressive leadership in financial reporting, accounting operations, and compliance across fintech, SaaS, startup, and investment companies. He has built and led accounting teams—both domestic and international—accelerated month-end closes, and managed complex multi-entity audits and consolidations.
That experience spans the full range of what a modern finance function demands: U.S. GAAP and technical accounting (ASC 606, 842, and 830), internal controls, FP&A, and partnering directly with founders and executives to turn numbers into decisions. It ranges from an alternative-investment fund administrator overseeing a $4.5B vehicle to a high-growth SaaS company carried through its acquisition by a public company.
We built BooksClose on a simple idea: growing businesses and startups deserve the same caliber of financial leadership that large companies rely on—delivered personally, flexibly, and at a fraction of the cost. As we grow, we’re building a team that brings that same standard to every client.
Who We Work With
Owner-operated companies that need senior financial oversight and a dependable close—but aren’t ready to hire a full-time controller or finance team.
Early-stage teams that need clean, investor-ready financials, GAAP-compliant reporting, and clear runway and burn visibility as they scale.
Businesses preparing for an audit, financing round, acquisition, or building out an in-house accounting team for the first time.
Where We Work
Based in Los Angeles and working on-site across Southern California—and partnering with growing businesses anywhere in the U.S. through fully remote service.
Dedicated Local Pages
Regional Coverage Across Southern California
Los Angeles, Santa Monica, Beverly Hills, Culver City, Pasadena, Long Beach & Glendale
Irvine, Anaheim, Newport Beach, Costa Mesa & surrounding cities
San Diego, Carlsbad & North County businesses
Riverside, San Bernardino & Ontario
Ventura, Thousand Oaks, Oxnard & Camarillo
Santa Barbara, Goleta & surrounding communities
Based in Los Angeles—serving Southern California on-site and the entire U.S. remotely. Whether you need an interim controller in Santa Monica or month-end close support from across the country, BooksClose works the way you do.
Insights & Resources
Clear, accurate explainers on the topics that trip up growing companies—plus free tools you can put to work today.
What the lease standard changed, who it affects, and when it took effect—plus a free ASC 842 Lease Amortization Schedule (Excel).
Read the guide & get the template →A practical framework for a faster, cleaner, audit-ready close every month.
Read the article →Eight signs your business has outgrown bookkeeping—and what to do about it.
Read the article →Who does what, what each costs, and which role your business actually needs.
In progressHow to hire, train, and onboard accounting staff—domestic and international.
In progressA ready-to-use schedule for calculating your right-of-use asset and lease liability under ASC 842. Enter your email and we’ll send it straight to your inbox.
Get in Touch
Tell us about your business and what you need, and we’ll follow up to set up a no-obligation consultation. Whether you need controller oversight, a cleaner month-end close, help getting audit-ready, or support building your accounting team, we’re glad to help you find the right fit.