Dental Practice Working Capital: How Much Do You Actually Need

Dental Practice Working Capital: How Much Do You Actually Need?

Most practice owners operate on a dangerous premise: that operating cash is "whatever is left after payroll and bills." This is how practices fail - not because they're unprofitable, but because they run out of cash despite being profitable on paper. Working capital is not optional. It's foundational. And almost every practice owner has it wrong.

WHAT IS WORKING CAPITAL?

Working capital is the cash you need to cover: Payroll (before patient payments arrive); Supplies and equipment; Rent, utilities, insurance; Debt service; Taxes. In other words: the gap between when you spend money and when you collect it. You treat a patient on Monday. You bill their insurance on Tuesday. They don't pay you for 30-45 days. You've already paid your lab, your hygienist, your rent. That gap = working capital requirement.

THE BENCHMARK: HOW MUCH SHOULD YOU HAVE?

Industry standard: 3-6 months of operating expenses in cash reserves. How to calculate: Add up monthly operating expenses: Payroll $25K/month + Rent/utilities/insurance $4K/month + Supplies/lab/other $6K/month = $35K/month. Multiply by months of reserve: Conservative (3 months) = $105K; Safer (6 months) = $210K.

For typical solo practice: Target $60K-120K; Comfortable $120K-200K; Excellent $200K+. For 2-doctor practice: Target $120K-250K; Comfortable $250K-400K; Excellent $400K+.

THE REAL SCENARIO: WHAT MOST PRACTICES ACTUALLY HAVE

Survey data: 35% of practices have less than 1 month in cash; 25% have 1-2 months; 20% have 2-3 months; 15% have 3-6 months; 5% have 6+ months. Translation: 80% of practices are operating with inadequate working capital. They're one equipment failure away from crisis.

WHY WORKING CAPITAL MATTERS (REAL SCENARIOS)

Insurance delay: Revenue is $80K/month (60% insurance). Insurance payment lag normally 30 days, occasionally 60. One month, major cases are delayed in insurance review. You've got $40K less cash in hand than normal. If you only have $50K in cash, you're underwater. Equipment failure: Root canal machine breaks ($8K); Computer server crashes ($5K); Sterilizer needs replacement ($12K). Do you have $25K immediate cash? Most solo practices don't. Solution: Put on credit card at 8-12% interest, then pay over 12 months. If you already have credit card debt, you're paying 15%+ interest on new debt.

HOW TO BUILD WORKING CAPITAL

Option 1 (Retain profit): Set aside 20% of net profit in cash reserve account. Don't touch it. Build over 3-5 years. Option 2 (Reduce owner distributions): Take 80% of profits as owner draw; Retain 20% in business. Over 3 years, you've built substantial reserve. Option 3 (Get a line of credit): Establish $50K-100K business line with your bank. Don't use it - keep as safety net. Cost: commitment fee ($0-500/year). Option 4 (Adjust payment terms): For cash patients, require 50% upfront. 30% after treatment, 40% at completion can smooth cash flow.

THE PSYCHOLOGICAL BARRIER

Most practice owners resist holding working capital because: "That money could be invested in the business"; "I could take it as a bonus"; "It's not earning a return"; "It feels wasteful." But working capital IS an investment. It's insurance. If you'd otherwise put money in a credit card loan at 15% interest, holding working capital instead is a guaranteed "return" of 15%.

YOUR ACTION PLAN

Calculate your monthly operating expenses (payroll + all bills). Multiply by 3 and 6 to get low and ideal targets. Check your current cash position. If inadequate, decide on build strategy (retain profit, reduce draws, get LOC). Set timeline: "We'll reach $150K by end of 2026." Automate: Put 20% of monthly profit into separate savings account. Most healthy practices have 3-4 months in the bank. Struggling practices have <1 month. Thriving practices have 6+ months.