If you've run a US small business for any length of time, you've probably hired both a bookkeeper and a CPA, or thought about hiring one and ended up unsure which you actually need. The line between the two roles is real, but it isn't where most owners think it is. There's also a third role, the Enrolled Agent, that adds a wrinkle most owners have never heard of.
This guide pulls the roles apart, walks through who does what, and helps you work out which one (or which combination) your business needs at this stage.
The simple distinction
In the most basic framing: bookkeepers record transactions, accountants interpret them. The bookkeeper produces the figures; the accountant tells you what those figures mean for taxes, structure, and strategy. The relationship is sequential. Bookkeeping happens monthly throughout the year; accounting happens at year-end and at decision points along the way.
That framing mostly holds, but it skips over an important detail: in the US, bookkeeping itself isn't a licensed profession. Anyone can call themselves a bookkeeper and charge for the work. Preparing and filing a tax return, or representing a client before the IRS, is different. That requires being a CPA (licensed at the state level), an Enrolled Agent (licensed federally by the IRS), or an attorney, under a framework called IRS Circular 230.
Three roles, one clear line
Bookkeeper (no license required), Enrolled Agent (federally licensed by the IRS to prepare returns and represent taxpayers), CPA (state-licensed, covers tax plus broader accounting and attest work). Bookkeeping certifications like AIPB exist and matter for quality, but they aren't a government license the way EA or CPA status is.
What bookkeepers do
Bookkeepers run the day-to-day records. The activities cycle weekly and monthly, with the output being a clean set of books at the end of each period. Their work covers reconciliation, transaction categorization, vendor and customer ledger management, payroll, and monthly reporting.
- Bank reconciliation across all accounts
- Transaction categorization with correct tax treatment
- Vendor bill processing and aged payables management
- Customer invoicing and aged receivables tracking
- Payroll runs with accurate W-2/1099 tracking
- Monthly P&L and balance sheet generation
- Books kept tax-ready ahead of quarterly deadlines
What bookkeepers do not typically do: tax planning, tax return preparation, entity structure advice, financial planning, statutory audits. The line is fairly clean and a good bookkeeper tells you when a question is outside their scope.
What CPAs and EAs do
CPAs and Enrolled Agents (what most US small businesses mean when they say 'accountant' or 'tax preparer') focus on tax law application: preparing and filing tax returns, planning around the tax structure, advising on entity decisions, and handling tax-side IRS matters. Their work happens at year-end and at decision points along the year, less so on day-to-day record-keeping.
- Tax return preparation and filing
- Tax planning across the year
- Entity structure advice (sole proprietor vs LLC vs S-corp)
- Estimated tax payment calculation
- IRS representation (audits, notices, appeals)
- CPAs specifically: attest work (audited or reviewed financial statements) where required
What CPAs and EAs don't typically do (well or efficiently): bank reconciliation, weekly vendor invoice processing, payroll runs. They can do all of these, but the hourly rate is higher than a bookkeeper's and it isn't their highest-value use of time. Most efficient setups have the bookkeeper handle the operational work and the CPA or EA handle the tax work.
Where the Enrolled Agent fits
An Enrolled Agent is a tax practitioner licensed directly by the IRS, either by passing a three-part exam covering individual and business tax, or through relevant prior IRS experience. EAs can prepare tax returns and represent taxpayers before the IRS in all 50 states, the same representation rights a CPA or attorney has, but EA status is specifically a tax credential rather than a broader accounting license.
For a lot of small businesses, an EA covers everything they actually need: accurate tax filing and someone who can talk to the IRS on their behalf if a notice shows up. A CPA license covers more ground (audited financial statements, broader assurance work) that most small businesses never touch.
Common confusion
A bookkeeper without EA or CPA status isn't doing anything wrong by keeping your books. The legal issue only comes up if someone without that credential prepares and signs a tax return or represents you before the IRS for a fee.
How the roles work together
For most US small businesses, the right structure is bookkeeper plus CPA or EA. The bookkeeper handles the operational work month to month; the CPA or EA handles the tax return at year-end.
The interaction across the year typically looks like this. Throughout the year, the bookkeeper runs the books, keeps them tax-ready ahead of each quarterly deadline, processes payroll, and produces monthly reports. At year-end, the bookkeeper hands the CPA or EA a clean year-end pack: trial balance, P&L, balance sheet, depreciation schedule, 1099 summary, payroll summary, any one-off items documented. The CPA or EA works from that pack to prepare and file the tax return, and where applicable provides tax planning advice for the coming year.
The cleaner the bookkeeping, the faster (and usually cheaper) the tax preparation. Many CPAs spend a meaningful portion of their year-end time cleaning up books before they can do the actual tax work. With proper bookkeeping in place across the year, the CPA focuses on the return rather than the data entry.
Which one do I need?
For most US small businesses past the very-low-volume sole proprietor stage, the answer is both. The decision is usually about timing and prioritization rather than choosing one over the other.
Just starting out
A sole proprietor doing fewer than fifty transactions a month, with no employees and a simple structure, often gets by with DIY bookkeeping plus a CPA or EA once a year. The bookkeeping work is light enough that the owner can keep on top of it; the year-end tax filing is where most of the technical work happens.
Active small business
Once transaction volume crosses a hundred or so a month, payroll comes online, or quarterly estimated tax gets meaningful, a bookkeeper becomes the right hire. The CPA or EA is still needed at year-end but the operational work shifts to the bookkeeper.
Growing business
Multi-employee businesses with active payroll, meaningful quarterly obligations, and real tax planning needs benefit from both functions running at full pace: bookkeeper running the books and keeping them tax-ready, CPA or EA running tax planning and the annual return. The cost of either being absent is greater than the cost of the role itself.
How each one charges
Bookkeepers typically charge a monthly retainer scaled to the volume of work: transaction count, payroll headcount, filing frequency. The retainer is predictable; you know what you are paying each month. Some bookkeepers charge hourly for ad-hoc work or catch-up engagements.
CPAs and EAs typically charge a fixed fee for the annual return (varying by entity type and complexity), with hourly billing for advisory work, planning, and IRS matters. The annual fee for a small business return is generally meaningfully higher than a single month of bookkeeping but covers a much narrower piece of work.
A useful rule of thumb: monthly bookkeeping costs across a year tend to be several times the cost of the annual tax return, but they are paying for very different things. The bookkeeping is the year-round operational discipline; the return is the year-end legal filing. Both are needed; neither replaces the other.
In short
Bookkeeping and tax preparation are different roles serving different functions in a US small business. The bookkeeper runs operations and keeps the books tax-ready throughout the year. The CPA or EA runs tax compliance and planning at year-end and at decision points. Only a CPA, EA, or attorney can legally file a return or represent you before the IRS.
Most established small businesses end up with both. Once that's in place, the books stay clean, the quarterly deadlines land without drama, the tax return runs smoothly, and the owner stops having to think about which role does what.