A restaurant can be packed every night and still go under in eighteen months. It happens constantly, and it’s rarely because the food was bad. It’s because nobody was watching the numbers closely enough, closely enough meaning weekly, not just at tax time. Restaurants run on razor-thin margins — the National Restaurant Association has long pegged average net profit margins in the 3-5% range — which means a few points of food waste, an untracked vendor price increase, or sloppy tip reporting can be the difference between a profitable month and a loss. Restaurant bookkeeping isn’t like bookkeeping for a typical service business. It has its own rhythm, its own metrics, and its own traps. Here’s what actually needs to be tracked every month to keep a restaurant financially healthy.
Why Restaurant Bookkeeping Is Different
Most small businesses invoice a client, get paid, and record one transaction. A restaurant processes hundreds of small cash and card transactions a day, manages perishable inventory that can spoil before it’s ever sold, handles tip income that has its own IRS reporting rules, and juggles a labor schedule that shifts hour by hour. On top of that, a restaurant’s point-of-sale (POS) system — Toast, Square, Clover, or similar — is generating sales data that needs to be reconciled against the bank deposit every single day, not once a month. If that reconciliation slips, small discrepancies pile up fast and become impossible to untangle by year-end.
This is why generic bookkeeping habits often fail restaurant owners. The numbers below are the ones that matter specifically because of how restaurants operate.
The Core Numbers to Track Every Month
1. Food Cost Percentage
Food cost percentage is calculated as cost of goods sold (COGS) divided by food sales. Most full-service restaurants target 28-35%, while quick-service concepts often run closer to 25-30%. If this number creeps up month over month, it usually points to portion drift, vendor price increases that haven’t been passed on to the menu, or theft and waste in the kitchen. Tracking it monthly — not quarterly — is what lets an owner catch the problem while it’s still a small one.
2. Labor Cost Percentage
Labor typically runs 25-35% of sales, depending on service style. This needs to include wages, employer payroll taxes, and benefits, not just the hourly rate on the schedule. Many owners only look at gross payroll and miss that the real cost of labor is 10-15% higher once taxes and workers’ comp are factored in.
3. Prime Cost
Prime cost is food cost plus labor cost combined, and it’s the single most useful health metric in restaurant accounting. A prime cost under 60% of sales is generally considered healthy; above 65% and margins get very thin, very fast. Because prime cost captures the two biggest controllable expenses in one number, it should be reviewed weekly if possible, and no less than monthly.
4. Sales Tax Collected and Owed
Sales tax collected from customers isn’t restaurant revenue — it’s money held on behalf of the state. It needs its own liability account and needs to be reconciled against POS reports monthly so the amount remitted always matches what was actually collected.
5. Tip Income and Tip Pooling
Tips have specific IRS rules: employees must report tips of $20 or more per month to their employer, and employers must withhold and pay payroll taxes on that reported tip income (see IRS Publication 531 and Form 8027 for large food and beverage establishments). If a restaurant uses tip pooling or tip credits toward minimum wage, those calculations need to be documented every pay period, not reconstructed after the fact.
6. Inventory and COGS
A physical inventory count at the end of each month, or more often for high-volume items like liquor, is what makes food cost percentage accurate rather than estimated. Without it, COGS is just a guess based on purchases, and purchases don’t equal what was actually used or sold.
7. Cash vs. Card Reconciliation
Every day’s POS sales report should tie out to the bank deposit, split cleanly between cash and card batches. Card processor fees also need to be booked as an expense rather than netted quietly against revenue, or the true cost of accepting cards gets buried.
8. Vendor Invoices and Accounts Payable
Restaurants deal with dozens of vendors — produce, meat, dairy, beverage distributors, linen services, waste haulers. Tracking accounts payable by vendor each month makes it possible to spot price creep and negotiate before it erodes margin.
Setting Up a Restaurant Chart of Accounts
A generic chart of accounts doesn’t cut it for a restaurant. At minimum, revenue should be broken out by category — food, beverage, alcohol, catering — since each carries a different margin and sometimes a different tax rate. Cost of goods sold should mirror those same categories so food cost and beverage cost percentage can be calculated separately. Labor should be split between front-of-house and back-of-house, and operating expenses should isolate occupancy costs (rent, utilities) since these are typically fixed and worth tracking against sales as a percentage over time. Setting this up correctly in QuickBooks or Xero from day one saves months of cleanup later.
A Practical Monthly Bookkeeping Checklist
- Reconcile every day’s POS sales against bank deposits (ideally done daily, reviewed monthly)
- Complete a physical inventory count and calculate actual food and beverage cost percentage
- Reconcile sales tax collected against amounts remitted
- Review payroll reports for tip reporting accuracy and overtime
- Calculate prime cost (food + labor as a percentage of sales) and compare to prior months
- Review accounts payable aging by vendor and flag price increases
- Reconcile credit card processing fees and confirm they’re booked as an expense
- Generate a profit and loss statement and compare against budget or the prior month
Common Mistakes Restaurant Owners Make
The most common mistake is treating bookkeeping as a once-a-month, after-the-fact chore instead of a daily habit. By the time a monthly P&L is reviewed, the week that caused a margin problem is long gone and hard to diagnose. Another frequent issue is not separating tip income properly, which creates payroll tax exposure. Owners also commonly skip physical inventory counts and rely on purchase totals alone, which overstates or understates true food cost depending on what’s sitting in the walk-in. Finally, many restaurants don’t reconcile their POS system to their bank account, which lets small discrepancies — a miscounted drawer, a refund that wasn’t recorded — go unnoticed for months.
Tools That Make Restaurant Bookkeeping Easier
Cloud accounting platforms like QuickBooks Online and Xero both integrate directly with major restaurant POS systems, which automates the daily sales import and cuts down on manual entry errors. Restaurant-specific POS platforms such as Toast, Square for Restaurants, and Clover generate the sales and labor reports that feed into monthly reconciliation. The combination of a connected POS and cloud accounting software, reviewed by someone who understands restaurant-specific metrics, is what turns bookkeeping from a rearview-mirror exercise into a tool for actually running the business.
When to Bring in a Professional Bookkeeper
Many restaurant owners start out doing their own books and hit a wall once they’re managing multiple revenue streams, a growing staff, and tip compliance all at once. If prime cost isn’t being calculated monthly, if sales tax reconciliation feels uncertain, or if the P&L is only being looked at when the accountant asks for it at tax time, it’s usually a sign the business has outgrown DIY bookkeeping. Ask For CPA’s bookkeeping services and accounting services are built around exactly this kind of monthly discipline, and our payroll services handle tip reporting and compliance correctly from the start. This isn’t a substitute for a CPA’s tax advice on entity structure or major financial decisions — for those, a licensed tax professional should always be part of the conversation — but ongoing monthly bookkeeping is what makes those bigger conversations possible in the first place.
Frequently Asked Questions
What is a good food cost percentage for a restaurant?
Most full-service restaurants target 28-35% of food sales, while quick-service concepts often aim for 25-30%. The right target varies by cuisine and menu pricing, but tracking it monthly is what matters most.
How often should a restaurant reconcile its books?
Daily sales-to-deposit reconciliation is ideal, with a full review of P&L, prime cost, and inventory at least monthly. Waiting until year-end makes it nearly impossible to trace where money went missing.
Do restaurants have to report employee tips to the IRS?
Yes. Employees must report tips of $20 or more per month to their employer, and the employer must withhold and pay payroll taxes on that income. Large food and beverage establishments also have additional reporting requirements under IRS Form 8027.
What’s the difference between food cost and prime cost?
Food cost is COGS divided by food sales. Prime cost adds labor cost on top of food cost, giving a combined view of the two largest controllable expenses in a restaurant. Prime cost is generally considered the more important number to watch monthly.
Staying on top of restaurant bookkeeping every month — not just at tax time — is what separates restaurants that survive thin margins from those that don’t. If your books need a reset or you’d rather hand monthly bookkeeping to someone who already knows restaurant metrics, get in touch with Ask For CPA to see how our services and pricing fit your restaurant.
