Key points
A bookkeeper records transactions, enters bills and invoices, and reconciles bank and card accounts.
The work runs on a weekly and monthly rhythm that ends in reconciled accounts and a trial balance.
Bookkeepers apply coding rules; accountants and controllers make accrual and revenue judgments.
Coding by vendor instead of purpose is the most common error, and it distorts gross margin.
Startups usually need more than bookkeeping once they bill upfront or by usage, or face an audit.
The short answer
A bookkeeper records a company's financial transactions and keeps the ledger accurate and current. The US Bureau of Labor Statistics describes the core work as posting debits and credits, reconciling records and producing basic reports. At a startup, that usually means categorizing card and bank activity, entering bills, sending invoices and reconciling accounts each month.
What a bookkeeper's month looks like
Generic lists of duties hide the rhythm of the job. At a 40-person software company, the work clusters around a weekly and monthly cadence.
When | Task | Output |
|---|---|---|
Daily or weekly | Categorize bank and card transactions; attach receipts | Coded transactions in the ledger |
Weekly | Enter vendor bills; prepare the payment run for approval | Accounts payable aging that matches the ledger |
Weekly | Send invoices; record customer payments | Accounts receivable aging |
Monthly | Reconcile bank, card and payroll clearing accounts | Signed bank reconciliations |
Monthly | Run standard reports for the accountant or controller | Trial balance and draft statements |
Worked example: coding a cloud bill
Illustrative only. Fieldnote AI, a fictional Series B company with usage-based pricing, receives an $18,000 monthly cloud invoice. A bookkeeper working from the vendor name alone might code all of it to "Software and hosting" in operating expenses.
The cloud console shows $12,000 of production compute that serves customers and $6,000 of development and staging environments. Production hosting belongs in cost of revenue. Dev and staging belong in research and development.
Account | Debit | Credit |
|---|---|---|
Cost of revenue: production hosting | $12,000 | |
R&D: development hosting | $6,000 | |
Accounts payable | $18,000 |
Coding it all to operating expenses would overstate gross margin by $12,000 that month. On $100,000 of revenue, that is a 12-point swing. The fix is a chart of accounts with separate hosting lines and a coding rule the bookkeeper can follow every month.
Bookkeeper vs accountant vs controller
These roles overlap at small companies, which is where confusion starts. The table shows where the line usually sits.
Work | Bookkeeper | Staff accountant | Controller |
|---|---|---|---|
Categorize transactions and enter bills | Owns | Reviews | Sets policy |
Bank and card reconciliations | Prepares | Reviews | Signs off |
Accruals, deferrals, revenue schedules | Rarely | Prepares | Reviews and approves |
Revenue recognition judgments | No | Supports | Owns |
Audit support and controls | Provides documents | Prepares schedules | Owns relationship with auditors |
Bookkeeping is mostly cash-and-category work. Once a company needs accrual-basis statements, deferred revenue, or audited financials, it needs accounting judgment on top. That is the point where a controller or an accounting team becomes necessary.
Signs bookkeeping alone is no longer enough
Investors or a lender ask for accrual-basis financial statements.
You bill annually upfront or by usage, so revenue and cash diverge.
Gross margin is a board metric and cost of revenue needs consistent tagging.
An audit, a priced round, or a multi-entity structure is coming.
The books are reconciled but nobody can explain why a number moved.
What to give a bookkeeper so the books come out right
Most bookkeeping errors at startups are instruction errors, not skill errors. A bookkeeper can only apply the rules they are given. Before handing over the books, write these down.
A coding guide. For your top 30 vendors, list the account and department each charge belongs to.
A COGS definition. Spell out which hosting, inference, third-party API and support costs count as cost of revenue.
A capitalization and prepaid threshold. For example, annual contracts over $5,000 paid upfront go to prepaid expenses.
A receipts policy. Who uploads receipts, by when, and what happens to card spend without one.
A cutoff date. The day each month after which new transactions roll into the next period's work.
In-house, outsourced or software-only
Option | Works well when | Watch out for |
|---|---|---|
Founder plus software | Very low volume, no investors asking for statements | Cash-basis habits and miscoded COGS that are expensive to fix later |
Part-time or outsourced bookkeeper | Steady volume, simple billing | Coding rules that nobody reviews; no accrual adjustments |
Outsourced accounting team | Investors want accrual statements; usage or annual billing | Make sure someone owns review and sign-off, not just entry |
In-house bookkeeper | High volume, many vendors and approvals | Still needs an accountant or controller above them |
Common mistakes we see at close
Coding by vendor, not purpose. One vendor can supply COGS and operating costs.
Treating annual prepayments as expenses. A $24,000 annual contract paid upfront is a prepaid asset, expensed monthly.
Uncleared reconciling items. Old items in a bank rec usually mean a duplicate or missing entry.
Cash-basis habits. Expenses recorded when paid, not when incurred, distort monthly results.
How Quanta handles it
Quanta pairs an accounting-first platform with an in-house accounting team that keeps the ledger. Transactions come in through integrations with Stripe, Ramp, Rippling, cloud bills and the customer's usage database, and COGS lines are tagged. The result is accrual-basis books that support a close, an audit, or a pricing decision.
Quanta perspective
Bookkeeping is necessary but it is not the same as accounting. A usage-based company can have perfectly categorized transactions and still report the wrong gross margin. The gap is accruals and cost tagging, which require judgment, not data entry.
Frequently asked questions
Is a bookkeeper the same as an accountant?
No. A bookkeeper records and organizes transactions. An accountant uses those records to make accrual adjustments, prepare statements and advise on tax and reporting.
Does a bookkeeper need to be certified?
Not in the US. Certifications exist and can signal skill, but they are not legally required to work as a bookkeeper.
Do bookkeepers file taxes?
Some prepare tax filings depending on their experience and authorization, but most startups use a CPA or tax firm for income tax returns.
When should a startup hire a bookkeeper?
Usually once transaction volume takes more than a few hours a week of a founder's time, or before the first institutional raise.
Can a bookkeeper do month-end close?
A bookkeeper can complete reconciliations and standard reports. Accruals, revenue schedules and review usually need an accountant or controller.