Finances 101 for Small Business Start-Ups
A Hunsinger Law Group General Counsel Resource
Mastering small business start-up finances is what separates the founders who thrive from the ones who burn out. Starting a business is equal parts vision and bookkeeping — and the clients who succeed aren’t the ones with the best idea; they’re the ones who build financial systems early. This guide gives you the five foundations, the books we recommend, the tools we trust, and the red flags that should make you call your lawyer.
The 5 Foundations of Small Business Start-Up Finances
- Choose the right entity — and elect the right tax treatment. An LLC is a legal structure; an S-Corp is a tax election. Most service businesses earning over ~$60,000 in net profit should evaluate an S-Corp election to reduce self-employment tax. Learn more from the IRS S-Corporation guidance. Get this wrong and you overpay the IRS for years.
- Separate everything. Day one. Dedicated business checking, savings, and credit card. Commingling personal and business funds is the single fastest way to lose your limited-liability protection (commonly known as “piercing the corporate veil”).
- Adopt a bookkeeping cadence. Weekly: categorize transactions. Monthly: reconcile and review your P&L. Quarterly: estimated taxes. Annually: CPA review and entity compliance filings (annual report, franchise tax, registered agent).
- Pay yourself on purpose. Use the Profit First method or Greg Crabtree’s “owner pay as a percentage of revenue” model. Owner pay is a budget item, not a leftover.
- Reserve for taxes before you spend a dollar. Sweep 25–30% of every deposit into a separate tax account. The Small Business Administration’s tax guide is a solid starting reference. The IRS is not a creditor you want to negotiate with.
Recommended Reading for Small Business Start-Up Finances
| # | Book | Author | Why It Matters |
|---|---|---|---|
| 1 | The E-Myth Revisited | Michael Gerber | Build systems; stop being the bottleneck. |
| 2 | Profit First | Mike Michalowicz | Behavioral cash management that actually sticks. |
| 3 | Simple Numbers, Straight Talk, Big Profits! | Greg Crabtree | The real P&L for owner-operated businesses. |
| 4 | Financial Intelligence for Entrepreneurs | Berman & Knight | Learn to read your own financials. |
| 5 | Traction | Gino Wickman | An operating system for scaling. |
| 6 | Tax-Free Wealth | Tom Wheelwright | Entity and tax strategy, in plain English. |
Tools We Like
- Bookkeeping: QuickBooks Online (paired with a real bookkeeper, not just the software)
- Banking: Relay or Bluevine — both support multiple sub-accounts, perfect for the Profit First system
- Payroll: QuickBooks Payroll first; Gusto can work; ADP is often more platform than a small business needs.
- Document & contract storage: Microsoft 365 / SharePoint or Google Workspace
- Legal counsel on retainer: Hunsinger Law Group’s General Counsel Package
🚩 Red Flags — Call Your Lawyer When…
- You’ve been paying personal expenses from the business account (or vice versa)
- You haven’t filed your annual report or paid your franchise tax
- You’re paying workers as 1099 contractors who look a lot like W-2 employees
- A vendor, landlord, or lender asks you to personally guarantee a contract
- You launched the business but never assigned the IP, domain, or branding to the entity
- A partner or co-founder is leaving — and there’s no operating agreement (or it’s outdated)
- You’re considering raising money, taking on a partner, or acquiring another business
- You’ve received any letter from the IRS, a state tax authority, or the Secretary of State
Ready to Master Your Small Business Start-Up Finances?
Hunsinger Law Group serves small business owners in Missouri and Illinois. Our General Counsel package gives you a lawyer on retainer for entity formation, operating agreements, contracts, compliance, and the day-to-day legal questions that come up when you’re running a business.
This factsheet provides general legal and business information and does not constitute legal or financial advice. Reading or downloading this resource does not create an attorney-client relationship with Hunsinger Law Group, LLC. For advice specific to your situation, please schedule a consultation.