The first month of bookkeeping for a new business sets everything later months rely on: a start date, a chart of accounts, the owner's opening money recorded as capital or a loan, startup costs gathered from wherever they were paid, the first bank statement converted and balanced, and a short set of rules. Getting them right once saves a cleanup.
What does the first month of bookkeeping for a new business include?
Month one includes the setup work that never repeats, done alongside an ordinary first close. Setup means choosing the start date, building the chart of accounts and recording where the business's money came from. The close means converting the first statement, coding its lines and reconciling. Both have to finish before the second month starts.
A new business is different from a new client with an existing business. There are no prior books to take over, no last year's balances, and no history to learn rules from. That makes setup easier, because nothing has to be unpicked, and harder, because every decision is a first decision. The first month is when the patterns are cheapest to change.
A first-month step list
- Agree the start date and fiscal year with the owner.
- Build a short chart of accounts that fits the business.
- Record the owner's opening money, with its terms.
- Gather startup costs paid before the business account opened.
- Convert and reconcile the first bank and card statements.
- Write a first set of categorization rules from the first statement.
- Start the client's procedures file with everything decided above.
Opening the books on a new business's start date
The books should open on the first day the business had money or obligations, which is usually the day its bank account opened. Opening balances are zero, except for what the owner put in. Pick the fiscal year at the same time, because the date range of the first year depends on it.
Ask the owner for the bank account opening documents and the first statement. The statement's opening balance may be zero, or it may show the first deposit on day one. Either way, the first statement is the starting point of the bank side of the books.
Build the chart of accounts small. A new consulting business might need fewer than twenty accounts at first: checking, a card, owner capital, owner draws, one or two income accounts, and a dozen expense accounts that match how the owner actually spends. Accounts are easy to add later. Unused accounts on day one clutter every report and invite miscoding.
If the owner has already changed banks once, or plans to move to a bank with better business services soon, ask about it now. Handling a bank change early is much simpler than in the middle of the year; bookkeeping when a client switches banks covers the steps.
Startup costs paid before the new business opened
Most new businesses spend money before the business account exists, usually from the owner's personal card or checking account. Those costs belong in the business books, recorded as paid by the owner. Collect the receipts, list them with dates and amounts, and post them as expenses or assets funded by an owner contribution or a loan from the owner.
The IRS has rules for how start-up and organizational costs are deducted. IRS Publication 583 says a business can elect to deduct up to $5,000 of business start-up costs and up to $5,000 of organizational costs, with each limit reduced by the amount those costs exceed $50,000, and the rest amortized. How the client's return treats them is the tax preparer's decision. The bookkeeper's job is to identify and label them so the preparer can apply the rule.
Keep startup costs visible
Post pre-opening costs to their own clearly named accounts, such as "Startup costs" and "Organizational costs," rather than spreading them across ordinary expense lines. Keep the list of receipts in the client file. A preparer looking at the first year needs to see which costs came before the business started and which came after, and a separate account makes that a single report.
Recording the owner's money going into a new business
The owner's first deposit is not income. It is either a capital contribution, which belongs in equity, or a loan from the owner, which belongs in liabilities. Ask the owner which it is and whether there are terms. The answer changes the balance sheet and may matter for taxes, so record it in writing.
Many owners have not thought about the difference. A short explanation helps: capital stays in the business and comes back through profit or draws; a loan is expected to be repaid, often on agreed terms. If the business has more than one owner, each owner's contribution should be recorded separately. If the owner is unsure, record it as a contribution, flag it, and let the preparer or the owner's adviser confirm.
A worked example
The figures below are made up for a fictional new design studio that opened its business checking account on May 1.
| Date | What happened | Entry |
|---|---|---|
| Apr 10 | Owner paid for business registration on a personal card, 320.00 | Organizational costs 320.00 / Owner contribution 320.00 |
| Apr 22 | Owner bought a laptop for the business on a personal card, 1,890.00 | Equipment 1,890.00 / Owner contribution 1,890.00 |
| May 1 | Owner deposited 10,000.00 into business checking | Checking 10,000.00 / Owner contribution 10,000.00 |
| May 6 | Website hosting paid from business checking, 240.00 | Web hosting 240.00 / Checking 240.00 |
| May 28 | First client payment received, 2,750.00 | Checking 2,750.00 / Design income 2,750.00 |
At the end of May, the owner has contributed 12,210.00 in total: 10,000.00 in cash and 2,210.00 in costs paid personally. The checking balance should be 12,510.00, which the first statement must confirm.
Converting a new business's first bank statement
The first statement is the first chance to prove the bank side of the books. Convert it, check that its opening balance plus its transactions equals its closing balance, and confirm the opening balance is what you expected: zero, or the first deposit. Then code each line and reconcile the ledger to the closing balance.
Expect the first statement to be short and a little odd. It often holds the opening deposit, a few setup charges, a card or checkbook fee, and only a handful of real operating lines. Read every line rather than relying on a rule, because there are no rules yet and every vendor is new.
If the business has a card, convert its first statement in the same sitting. Card setup months often include annual fees, and payments from checking to the card need to be matched on both sides. In AutoBankConvert, a statement is marked done only after its balance check passes, and each client keeps its own workspace, so a new business's history starts clean from the first file.
Time the first close. Month one usually takes longer than any later month, and knowing by how much helps you price the engagement honestly. The breakdown of where bookkeeping data entry hours go is a useful frame for that log.
Which categorization rules should a new business start with?
Start with a few firm rules for the vendors that will clearly repeat, and leave everything else to review. A new business has no history, so a rule written from one line is a guess. Rent, software subscriptions, the phone bill and the payment processor are safe early rules. One-off purchases are not.
A rule should be written when the line's meaning is certain and likely to recur. "Hosting company, monthly, 240.00" qualifies after the first month. "Office supply store, 86.40" does not, because the next visit may be for something else entirely. After two or three months, the patterns will be clear and rules can be added with confidence.
Keep a short note of every rule and the reason for it in the client file, together with the start date, the chart of accounts and the owner's capital terms. That file grows into the client's operating manual; the guide to writing a client bookkeeping procedures document shows what to put in it.
First-month traps when a new business has no history
The traps in month one all come from the lack of anything to compare with. There is no prior month to show that a number is unusual, no past coding to copy, and often an owner who is still learning which expenses are business ones. The bookkeeper has to supply the judgment the history would normally give.
The common traps are:
- Business spending from personal accounts. The owner keeps using the personal card for business purchases after the business account opens. Ask each month and record those costs as contributions until the habit stops. IRS Publication 583 advises keeping the business account separate from personal checking.
- Personal spending from the business account. The new account is used for a personal purchase. Record it as an owner draw, not an expense.
- Missing receipts for pre-opening costs. The owner remembers the spending but cannot find the receipts. Ask for card statements as a fallback, and list each item with a note.
- Advice beyond bookkeeping. New owners often ask about entity choice, payroll or tax elections. Refer those questions to the right adviser. Giving such advice casually is where a bookkeeper's own risk grows; errors and omissions insurance for bookkeepers explains what that cover is for.
When the first month closes, the second month should feel like a normal close: one statement per account, a few new vendors, and rules beginning to do the routine work.