Multi-Unit Franchise Back Office: At What Unit Count Does a Central Bookkeeper Pay?

At what unit count does a multi-unit franchise back office pay for itself? In the worked example below, one central bookkeeper breaks even at 10 units and runs out of hours at 11, so the window where a single hire clearly pays is only two units wide.

A multi-unit franchise back office is the central function, usually bookkeeping, payables, payroll entry and deposit reconciliation, that an operator runs once for every unit instead of leaving it to each unit's general manager. The decision is a break-even calculation with three inputs: what the hire costs fully loaded, how many manager hours it takes off the units, and how many hours the new person can absorb. Most operators run the first and skip the other two.

The figures below come from two federal sources and three assumptions. The assumptions are mine, labeled as such, and the scorecard near the end shows how to replace them with your own.

What does a multi-unit franchise back office hire really cost?

A central bookkeeper costs a multi-unit operator about $72,400 a year fully loaded, using the federal median wage and the average private-industry benefit share. That is the number to beat. A posted salary understates the cost by roughly 30 percent, because benefits and employer costs sit on top of the wage.

The Bureau of Labor Statistics reports that the median annual wage for bookkeeping, accounting, and auditing clerks was $50,670 in May 2025. Its Employer Costs for Employee Compensation release shows wages and salaries were 70.0 percent of private-industry employer compensation costs in June 2026, with benefit costs making up the other 30.0 percent. Dividing the wage by 0.70 gives $72,386. That is an all-industry average, so an operator with thinner benefits will land lower and a high-cost metro will land higher.

A worked example: one bookkeeper, ten units

Assume each unit's general manager spends 5 hours a week on back-office work today: entering invoices, chasing receipts, matching deposits and keying payroll. That is an assumption, not a statistic. Assume a manager's loaded cost is $30 an hour, also an assumption. Then:

Step 1. Manager time per unit per year: 5 hours × 52 weeks = 260 hours.

Step 2. Value of that time per unit: 260 hours × $30 = $7,800.

Step 3. Break-even units: $72,386 ÷ $7,800 = 9.28, so 10 units.

Step 4. Net at 10 units: 10 × $7,800 = $78,000 recovered, minus $72,386, leaves $5,614 a year.

Now the capacity check. Assume the central person handles one unit's back office in 3 hours a week, because one process and batched entries beat ten managers doing it ten ways. Assume 1,800 productive hours a year, which is 2,080 paid hours less an assumed 280 for leave, holidays and training. Each unit then takes 3 × 52 = 156 hours, and 1,800 ÷ 156 = 11.5, so one bookkeeper covers 11 units.

Step 5. Net at 11 units: 11 × $7,800 = $85,800, minus $72,386, leaves $13,414 a year.

Why does one hire stop paying at 11 units?

Because a person has a fixed number of productive hours. In this example one bookkeeper covers 11 units at 156 hours each, and the twelfth forces a second hire or overtime. Cost then steps up by $72,386 while recovered time rises by only $7,800, so the cushion disappears.

At 12 units with a second full hire, recovered time is $93,600 against $144,771 in cost, a loss of $51,171 a year. The second hire does not pay for itself until 19 units, where $148,200 recovered beats $144,771 by $3,429. Staffing cost moves in steps, so growth leaves stretches where the back office is a net drag. A part-time hire or outsourced overflow is one way to cover a stretch, and the same break-even test applies to it.

The result also moves fast with the assumptions. If managers lose only 3 hours a week per unit, recovered time is $4,680 per unit and 11 units recover $51,480, so one bookkeeper never pays on manager time alone. If managers lose 5 hours a week at a $40 loaded rate, recovered time is $10,400 per unit and the hire breaks even at 7 units.

When is manager time the wrong test?

Hours are the easy test, not always the right one. Our earlier debt service coverage walk-through shows how a new loan leans on the results of your existing units, so clean monthly books can matter even when the hours do not add up.

An accountant is a different decision. The BLS median for accountants and auditors is $83,680 in May 2025 data, which is $119,543 loaded. At $7,800 recovered per unit, $119,543 ÷ $7,800 = 15.3, so it takes 16 units of recovered manager time to justify that salary on hours alone. Hire at that level for reasons the hours test cannot see, such as lender reporting, unit-level profit statements, or catching coding errors before the month closes.

Recovered time also has value only if it moves to something managers are measured on. A manager bench strength score shows whether the freed hours reach the people who need them, and a four-number unit economics scorecard shows whether the result lands in labor or sales.

A four-line scorecard for your own back office

Line 1, hours: have three general managers log back-office minutes for two weeks, then average them per unit per week.

Line 2, rate: divide each manager's hourly wage by 0.70 as a first estimate of loaded cost, or use the actual figure from your payroll provider.

Line 3, capacity: pilot the central process on three units to get handling hours per unit, then divide productive hours by weekly handling hours × 52.

Line 4, break-even: loaded cost of the hire ÷ (manager hours × 52 × rate). Hire only if the break-even unit count sits at or below the capacity, and write down the unit count where the next step cost arrives.

What to run before you post the job

For unit-level numbers in one place, see Revscale's multi-unit operator tools.

Run the four lines on your own units before posting a job. Time three managers for two weeks, compute the break-even and the capacity, and put the unit count where the second hire would start next to your growth plan. If the break-even sits above the capacity, your multi-unit franchise back office is not ready to centralize on hours alone, and the case has to rest on reporting rather than labor.