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Finance · Setup

How to Set Up Your Startup's Books

Accounting tools, chart of accounts, monthly close, and what investors expect to see by the time you raise.
8 min readUpdated Apr 30, 2026

Founders who set up their books well sleep through fundraising diligence. Founders who don't spend three weeks reconstructing 18 months of transactions while a Series A clock is ticking. The right setup takes 1-2 days upfront and saves weeks later.

Pick the right tools

For most US-based startups, the standard stack:

  • Bookkeeping software: QuickBooks Online, Xero, or NetSuite (later stage). QBO is the dominant choice for early-stage.
  • Bookkeeper service: Pilot, Bench, Zeni, or a local bookkeeper. Cost: $200-1500/month depending on transaction volume.
  • Spend management: Brex, Ramp, or Mercury (also your bank). Modern cards with accounting integrations save hours.
  • Bill pay: Bill.com or Mercury Bill Pay. Categorizes vendor invoices automatically.
  • Payroll: Gusto or Justworks. Handles tax filings, benefits, and equity reporting.
  • Cap table / equity: Carta, Pulley, or AngelList. Separate from accounting but needs to reconcile to it.

The chart of accounts (COA)

The COA is the categorization scheme for every transaction. Get this right early — restructuring it later is painful.

A standard SaaS COA structure:

  • Revenue accounts: Subscription revenue, services revenue, other revenue. Sub-categorize by product line if relevant.
  • COGS: Hosting, third-party API costs, customer success salaries (if directly tied to delivery), payment processing fees.
  • OpEx — Engineering: Salaries, contractors, dev tools, software licenses.
  • OpEx — Sales & Marketing: Salaries, commissions, ad spend, marketing tools, events.
  • OpEx — General & Admin: Founder/admin salaries, legal, accounting, office, software (if not categorized elsewhere).
  • Other: Interest income/expense, taxes, one-time items.

Don't use 50 accounts when 20 will do. Investors look at categories, not granular line items at this stage.

Monthly close — the operating discipline

A clean monthly close is the difference between knowing your numbers and guessing at them. The process:

  1. Reconcile bank and credit cards. Match every transaction to a category. Bookkeepers handle this if you have one.
  2. Record accruals. Revenue earned but not yet billed; expenses incurred but not yet paid.
  3. Verify deferred revenue. Annual contracts get recognized monthly. Don't book all 12 months at signing.
  4. Run management reports. P&L, balance sheet, cash flow. Compare to plan.
  5. Lock the period. No more adjustments to that month. Next month starts clean.

Target: close in 5-10 business days. Weekly close is overkill at this stage. Quarterly is too slow.

The numbers that matter

Investors care about a small number of metrics, derivable from clean books:

  • MRR / ARR. Monthly and annual recurring revenue, calculated from active subscriptions.
  • Net new ARR by month. New + expansion - churn - contraction. The single best growth metric.
  • Net burn. Cash out minus cash in, monthly.
  • Runway. Cash in bank ÷ net burn. See our runway calculator.
  • Gross margin. (Revenue - COGS) ÷ Revenue. 70%+ for SaaS, 30-50% for marketplaces, varies for hardware.
  • CAC payback. Months to recover acquisition spend. Healthy: under 18 months.

What investors expect to see

By Series A diligence:

  • Monthly P&L for the trailing 18-24 months.
  • Monthly balance sheet for the same period.
  • Cash flow statement, monthly.
  • Cohort retention analysis (revenue and logo, by signup month).
  • Customer-level revenue table (anonymized if needed).
  • Vendor-level expense breakdown for top 10 vendors.

If your books aren't producing these in a few clicks, you'll spend 2-3 weeks of fundraising prep just on financial cleanup.

Common bookkeeping mistakes

  • Mixing personal and business expenses. Painful to unwind at diligence. Use a clean business card from day one.
  • Cash accounting at SaaS companies. Distorts the picture. Use accrual.
  • No deferred revenue tracking. Annual contracts look like a giant revenue spike, then nothing. Recognize monthly.
  • Missing the founder salary entry. Even if founders take $0 salary, document it as deferred. Investors will ask.
  • Late close. Closing past the 15th of the next month signals weak finance ops. Especially during fundraising.

The financial model templates in our templates library are designed to fit the books a properly-set-up startup will produce. The two should reconcile cleanly.

FAQ

Do I need an accountant before I have revenue?+
Probably not. A clean bookkeeping setup (QuickBooks/Pilot) and a quarterly bookkeeper review is enough until you have ongoing revenue or are raising. Hire a CFO or controller around $1-2M ARR.
Cash or accrual accounting?+
Accrual. Investors expect it. Cash accounting is simpler but distorts the picture for SaaS — you can't see deferred revenue or commitments. Most accounting tools default to accrual.
How long does monthly close take?+
5-10 business days at small scale; 3-5 with mature processes. Closing past day 15 of the next month signals weak finance ops to investors.
What's the difference between bookkeeping and accounting?+
Bookkeeping = recording transactions accurately. Accounting = analyzing and reporting from those records. Founders need both — bookkeeping is monthly, accounting is at quarter/year-end and during fundraising.
Do I need an audit?+
Not until late stage. Series A typically needs a 'review' (lighter than audit) by an independent CPA. Series B+ may need a full audit. Most early companies skip both.