How to Start an Accounting Firm
To start an accounting firm, confirm your licensing (a CPA license is required to offer attest services and use the CPA title), register a legal entity, choose your service mix and pricing, set up your software stack, and build a client pipeline. You can start solo from home and grow into a multi-person practice.
Starting your own accounting firm gives you control over your clients, your rates, and how you work. It's more involved than launching a bookkeeping business — licensing and service scope matter more — but the path is well worn. Here's the roadmap.
Step 1: Understand the licensing rules
This is where an accounting firm differs from a bookkeeping business. In the US:
- You do not need to be a CPA to offer bookkeeping, write-up, payroll, and advisory services. Many successful firms are built on these.
- You must be a licensed CPA to perform attest services (audits, reviews) and to market yourself using the "CPA" title. Rules are set state by state through your State Board of Accountancy.
- Tax preparation requires a PTIN from the IRS; representing clients before the IRS requires being a CPA, EA, or attorney.
Decide early which lane you're in. If you want to start a CPA firm, confirm your license is active and check your state board's firm-registration and firm-name requirements — some states require a firm license or a CPA-ownership percentage. If you're building a non-attest advisory and accounting firm, you have more flexibility.
Step 2: Choose your services
Your service mix defines your firm. Common offerings:
- Tax — preparation and planning for individuals and businesses.
- Bookkeeping and write-up — the recurring monthly work.
- Client Accounting Services (CAS) — outsourced accounting plus advisory, one of the fastest-growing and highest-margin areas in the profession. See the client accounting services guide for how to build this line.
- Attest — audits and reviews (CPA firms only).
- Advisory / fractional CFO — the premium tier.
Most new firms anchor on one or two services and expand. Recurring services (bookkeeping, CAS, monthly advisory) give you predictable revenue instead of the feast-and-famine of tax-season-only work.
Step 3: Register the firm
Set up the business properly:
- Choose an entity. A single-member LLC is common for solo founders; PLLCs, partnerships, and PCs are options depending on your state and whether you're a CPA. Some states restrict firm structures for CPA firms — check your board.
- Get an EIN from the IRS.
- Register the firm with your State Board of Accountancy if you're operating as a CPA firm.
- Carry professional liability insurance (malpractice / E&O). This is non-negotiable for an accounting firm.
- Open business banking and set up your own books from day one.
Step 4: Build your technology stack
A modern firm runs on software. At minimum:
- General ledger — QuickBooks Online and Xero for client books.
- Tax software — if you offer tax (Drake, Lacerte, ProConnect, UltraTax).
- Practice management — to track work, deadlines, and staff capacity across clients.
- Secure document collection — a client portal for requesting and storing statements and source documents.
- Payments and engagement letters — to get paid predictably and define scope.
Standardize your stack so every client runs the same way. Consistency is what lets a firm scale without chaos.
Step 5: Set pricing that reflects value
Move away from hourly billing wherever you can. Fixed-fee and monthly-subscription pricing align your income with the value you deliver rather than the time you spend, and they smooth revenue across the year. Price CAS and advisory as monthly packages; price tax as fixed per-return fees based on complexity.
Step 6: Build your pipeline
Your first clients typically come from your professional network, referrals from bankers and attorneys, a niche website, and — powerfully — from other CPAs who are overloaded and refer overflow. If you're starting adjacent to a bookkeeping practice, the mechanics of client acquisition overlap heavily with how to start a bookkeeping business; the same referral and niche strategies apply.
A concrete example: A newly licensed CPA leaves a regional firm to start her own practice. She registers a PLLC, confirms firm registration with her state board, and decides to skip audits entirely — focusing on tax plus monthly CAS for professional-services clients (law firms, agencies, consultants). She prices CAS at $1,500–$4,000/month depending on complexity and tax as fixed fees. Her first six clients come from two attorney referral partners and her old employer's overflow. By choosing a clear niche and recurring-revenue services, she has predictable income in her first year instead of living tax season to tax season.
Step 7: Design for capacity before you're buried
The classic failure mode for a new firm is winning clients faster than you can serve them — especially in the compressed weeks of tax season and month-end close. The bottleneck is almost always the repetitive execution work: reconciliations, close, write-up, cleaning up client data.
As your firm grows, AI workspaces built specifically for accounting firms — OCTA Flow is one — run those repetitive steps on your real files inside a reviewable, audit-trailed workflow, so a small team can serve more clients without a proportional headcount increase. That's a growth-stage lever, not a day-one requirement. When you're starting out, the priority is a clear niche, recurring-revenue services, and clean standardized processes.
Frequently Asked Questions
Do I need to be a CPA to start an accounting firm? Not necessarily. You can build a firm offering bookkeeping, write-up, payroll, tax preparation (with a PTIN), and advisory without a CPA license. You must be a licensed CPA to perform audits and reviews or to use the "CPA" designation in your firm name and marketing.
How much does it cost to start an accounting firm? A solo firm can start for roughly $2,000–$10,000, covering entity and board registration, insurance, and software (tax software is the biggest line item). Costs rise as you add staff and office space.
What services are most profitable for a new firm? Client Accounting Services (CAS) and advisory tend to carry the highest margins and provide recurring monthly revenue, versus the seasonal spike of tax-only work.
How do I get my first clients for an accounting firm? Referral partnerships (attorneys, bankers, and overloaded CPAs), a niche-focused website, and your existing professional network are the most reliable early sources. A specific niche makes all of these convert better.
Building the recurring-revenue side? Read the client accounting services guide, or subscribe for practical guides on launching and growing a firm.