Basic Accounting for Startups,
Explained Once
How an entry works, the five kinds of account, what to set up in your first week, and the four-step routine that keeps the books usable. Written for founders who have never kept books.
The accounting a founder needs, and nothing more
Last updated 19 September 2026
What basic accounting for a startup is
Basic accounting for a startup is keeping a complete, categorized record of every dollar that enters or leaves the company, and checking that record against the bank every month. Everything else - financial statements, tax returns, investor updates, a runway number - is a report generated from that record.
That is the whole job at the start. You do not need to know how to prepare a tax return or what GAAP says about revenue recognition. You need the record to exist, to be complete, and to be sorted into the right buckets, because every later question gets answered from it and a record with holes cannot be repaired cheaply a year on.
This page covers the mechanics. The decisions that come after - cash or accrual, what investors read, which filings are due before you have revenue - are in the longer guide to accounting for startups.
Every transaction is recorded twice
A customer pays you $1,000 by card through Stripe. Two days later $970.70 arrives in your bank. Here is that one sale as an accountant writes it down:
| Account | Debit | Credit |
|---|---|---|
| Bank account (an asset) | $970.70 | |
| Payment processing fees (an expense) | $29.30 | |
| Sales (revenue) | $1,000.00 | |
| Total | $1,000.00 | $1,000.00 |
This is double-entry bookkeeping: every transaction touches at least two accounts, and the debits always equal the credits. Debit and credit do not mean good and bad. They are the left and right columns. A debit increases an asset or an expense; a credit increases revenue, a liability or equity.
The reason to bother is that the two sides check each other. If you had written down only the $970.70 that reached the bank, your revenue would be understated by $29.30 and the fee would not exist anywhere in your books. Accounting software does the two-sided part for you. What it cannot do is know that the deposit was a sale with a fee inside it, which is why Stripe payouts never match revenue in books that record deposits as they land.
There are only five kinds of account
Every line in your books belongs to one of five types. The list of accounts you actually use, grouped under these five, is your chart of accounts.
| Type | What it holds | Startup examples |
|---|---|---|
| Assets | What the company owns or is owed | Bank balance, Stripe balance, unpaid customer invoices, laptops |
| Liabilities | What the company owes | Credit card balance, unpaid bills, payroll taxes withheld, loans |
| Equity | What is left for the owners | Founder stock, money from a priced round, accumulated profit or loss |
| Revenue | What customers paid for your product | Subscriptions, usage fees, services |
| Expenses | What it cost to operate | Payroll, contractors, cloud hosting, software, legal, processing fees |
The first three are tied together by the accounting equation: assets = liabilities + equity. They make up the balance sheet, a snapshot of the company on one date. Revenue and expenses make up the profit and loss statement, which covers a period, and whatever is left over rolls into equity at the end of it.
One consequence matters more for a startup than for any other kind of business. Money from investors is never revenue. A SAFE, a convertible note or a priced round lands on the balance sheet, because nobody bought your product. The longer guide covers how fundraising is recorded and what it costs when it is recorded as income.
Four things to set up in your first week
- A business bank account and card, used for everything. Once company and personal spending share an account, every statement line has to be argued over one at a time, and the separation between you and the corporation gets harder to defend.
- A ledger connected to the bank by a feed. The ledger is the software that holds your books. A bank feed imports every transaction automatically. A spreadsheet you type into is missing whatever you forgot to type.
- A place where receipts and invoices go the day they arrive. The IRS expects supporting documents behind the entries in your books, and lists what counts in Publication 583. A shared folder or a forwarding inbox is enough. Most records need to be kept for at least three years after the return they support, and employment tax records for four, per the IRS guidance on how long to keep records.
- A Form W-9 from every contractor before the first payment. You need their legal name and tax ID to issue a 1099-NEC in January, and it is far easier to collect before you pay than after they have moved on.
The monthly routine is four steps
- Reconcile. For each bank and card account, confirm that the ending balance in your books equals the ending balance on the statement. If they differ, something is missing or recorded twice, and the month is when it is easiest to find.
- Clear the uncategorized pile. Every transaction the software could not sort needs an account. Do it while you still remember what the charge was.
- Read the profit and loss next to last month's. You are looking for lines that moved without a reason you know of. A software bill that doubled is either a real decision or a duplicate entry.
- Write down cash and burn. Cash in the bank, divided by what you spent net of revenue this month, is your runway in months.
The burn rate and runway calculator does step four from three numbers, including what happens to the runway date if revenue keeps growing.
The terms you will hear, defined once
| Term | What it means |
|---|---|
| General ledger | The complete list of every entry in your books. Every report is a view of it. |
| Reconciliation | Proving that the books and the bank statement agree for a period. |
| Closing the books | Finishing a month: reconciled, categorized, reviewed, and no longer edited. |
| Burn rate | Cash spent per month. Net burn subtracts the revenue collected in that month. |
| Runway | Months until cash reaches zero at the current net burn. |
| Accounts receivable | Invoices you have sent that customers have not paid yet. |
| Accounts payable | Bills you have received and not paid yet. |
| Deferred revenue | Cash a customer paid in advance for service you have not delivered yet. It is a liability until you deliver. |
| Cost of goods sold | Costs that rise directly with each sale, such as hosting for a software product or processing fees. Revenue minus this is gross margin. |
| Cash basis and accrual basis | Two rules for when a transaction counts: when money moves, or when it is earned or owed. |
The last row is a decision rather than a definition, and it has its own section in the longer guide: cash or accrual.
Five mistakes that are cheap now and expensive later
Paying for company things personally and never recording it. The expense is real, but it only counts if it is in the books. Record it as an expense and as money the company owes you, then reimburse yourself.
Recording investor money as income. It inflates revenue, and revenue is what tax is calculated from and what the next investor checks first.
Recording processor payouts as revenue. The deposit is net of fees and sometimes of refunds. Revenue is the gross amount, as in the $1,000 example above.
Leaving everything in one expense account. A profit and loss with a single line called "Expenses" cannot tell you what your team costs or what your product costs to run, and re-sorting a year of transactions is slower than sorting them as they arrive.
Assuming nothing is due until there is revenue. A Delaware C-corp owes franchise tax, an annual report and a federal return for its first year even with zero sales.
The startup tax deadline calendar lists every federal and state date for your entity type and state.
Where basic stops
Everything above can be done by a founder with accounting software. It stops being basic at three points: the first tax return, the first time an investor asks for financial statements, and the first employee, because payroll brings withholding and state registrations with it.
The record you have been keeping is what makes each of those cheap. A preparer working from reconciled, categorized books prepares a return. A preparer working from a bank export rebuilds a year of bookkeeping first and bills for it.
Next: the full guide to accounting for startups, who can do bookkeeping for startups and what it costs, or how Vecty keeps the record for you.
Everything on this page, done for you
The steps above are the work. Vecty does them daily and a licensed CPA checks the result.
Transactions recorded as they land
Bank, card, Stripe and payroll feeds are imported and categorized every day. Processor payouts are split into gross revenue, fees and refunds rather than booked as one deposit.
Reconciled and closed monthly
Every account is reconciled to its statement and the month is closed without you sending a spreadsheet or answering a list of questions from memory.
Returns prepared from the same books
Federal and state returns, Delaware franchise tax and 1099s are prepared from the ledger you already have, then reviewed and signed by licensed CPAs.
Deadlines tracked before they are due
Every federal and state filing date for your entity and state is on a calendar from day one, including the ones that apply before you have revenue.
The record is cheap to keep and expensive to rebuild
Nothing on this page is hard. It is only hard a year later, from a bank export.
Your first return is prepared from these books
A preparer who receives reconciled, categorized books prepares a return. A preparer who receives a bank export rebuilds the year first, and that rebuild is billed by the hour.
Investors read the record, not the pitch
Diligence asks for monthly financials and ties them to bank statements. Investor money recorded as revenue or founders' cards mixed into company spend are exactly what it is built to find.
Runway is only as good as the categorization
Burn and runway come straight from the ledger. If a quarter of your transactions sit uncategorized, the number you are planning against is a guess.
Credits depend on what was recorded
The R&D payroll tax credit is claimed from payroll and vendor costs that were recorded and categorized at the time. Spending that never made it into the books cannot be claimed.
From a bank login to managed books in hours
Connect your accounts
Link banks, cards, Stripe and payroll in one session. Bank connections are read-only. Existing books are migrated and cleaned up.
The platform keeps the record
Transactions are categorized daily, accounts are reconciled, and the month closes on schedule.
A CPA reviews and files
Licensed CPAs review the books and sign every return, so the basics are done correctly without you learning them twice.
Basic startup accounting questions, answered
What first-time founders ask before their first tax season.
Basic accounting for a startup is keeping a complete, categorized record of every dollar that enters or leaves the company, and reconciling that record against the bank each month. Financial statements, tax returns and a runway number are all reports generated from it.
Bookkeeping is recording and categorizing transactions and reconciling them to the bank. Accounting is what gets done with that record: deciding how items are treated, producing financial statements, and preparing tax returns. A founder can do the first with software. The second is where a licensed CPA earns the fee.
Yes. A corporation files a federal return every year whether or not it has income, and a Delaware C-corp owes franchise tax and an annual report by March 1 with zero sales. Pre-revenue spending is also what later supports deductions and R&D credit claims, and only if it was recorded.
For the first few months, yes, but a spreadsheet only contains what you remembered to type. Accounting software connected to your bank by a feed imports every transaction automatically and enforces double entry, so the record is complete and the two sides of each entry check each other.
The IRS says to keep records for at least three years after the return they support, and employment tax records for at least four years. Keep incorporation documents, stock records and anything tied to an asset for as long as the company exists.
Stop managing your books. Let Vecty manage them for you.
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