When to Hire an Office Manager (and What They Should Own)
By BRIX Editorial Team · Updated
Hire an office manager when the owner is spending evenings on invoices, payroll and vendor bills, when money is slipping through slow billing or collections, or when office staff have no one to report to. A trades office manager owns billing, receivables, payroll prep and the office team. BLS puts comparable office supervisors at $33.42 an hour.
Key takeaways
- The clearest signal is cash: invoices going out late, receivables aging, and the owner doing paperwork at night.
- Decide whether you need a manager (runs people and the office) or a bookkeeper (runs the books). They pay differently.
- Pay benchmarks at specialty trade contractors: $33.42 for office supervisors, $25.99 for bookkeeping clerks (BLS, May 2025).
- Test candidates on real paperwork: an aging report, a payroll exception and an angry customer email.
- Hand over ownership in writing, area by area, over 90 days.
What are the signs you need an office manager?
You need an office manager when the office work is costing you money or keeping you from the work only you can do. Most owners feel it as tiredness before they see it in numbers, so check the numbers: how many days between finishing a job and sending the invoice, how much is over 60 days past due, and how many hours a week you spend on admin.
- Invoices go out days after the job, or in a batch at the end of the week.
- Receivables over 60 days keep growing, and nobody owns calling those customers.
- Payroll errors come up every few pay periods because timesheets arrive late or messy.
- Insurance renewals, licenses and vendor accounts get handled at the last minute.
- Your CSR or dispatcher has no one to go to when the owner is on a job.
- You do paperwork most nights and Sundays.
If only billing and books are behind, a part-time or outsourced bookkeeper may be the right first step. If people, vendors and the office as a whole need running, you need a manager.
What should a trades office manager own?
An office manager should own outcomes, not just tasks. O*NET's description of office supervisors centers on supervising office staff, resolving escalated customer issues, reviewing payroll and activity records, scheduling the office team and hiring. In a trades shop, that translates into these areas:
| Area | Owns | Measure |
|---|---|---|
| Billing | Invoices out on the day the job closes, correct and complete | Days from job complete to invoice |
| Collections | Calling and following up past-due accounts | Share of receivables over 60 days |
| Payroll prep | Clean timesheets to the payroll provider on time | Payroll corrections per month |
| Office team | CSRs and dispatch: schedules, coaching, coverage | Answer rate, booking rate, staff turnover |
| Vendors and compliance | Supplier accounts, insurance certificates, license renewals | Lapsed items (should be zero) |
| Owner reporting | A weekly one-page summary: sales, cash, receivables, open estimates | Delivered every Monday |
Office manager or bookkeeper: which do you need?
| Bookkeeper | Office manager | |
|---|---|---|
| Main job | Record and reconcile transactions | Run the office, often including the books |
| Manages people? | No | Yes, usually CSRs and dispatch |
| Customer contact | Billing questions | Escalated complaints, collections calls |
| Typical background | Bookkeeping or accounting clerk | Office supervisor, service manager, senior CSR |
| BLS median at specialty trade contractors (May 2025) | $25.99 | $33.42 |
Many shops start with a strong bookkeeper and grow them into the manager role as the office team expands. That works if the person wants to manage people. Ask in the interview; plenty of excellent bookkeepers don't.
What does an office manager cost?
BLS counts 36,420 office supervisors at specialty trade contractors with a May 2025 median of $33.42 an hour, or $69,510 a year. HVAC, plumbing and electrical contractors pay a bit more, $34.25. State medians range from $25.80 in West Virginia to $38.21 in Washington. Add payroll taxes, benefits and equipment for the total cost; the office manager pay guide works through an example with the payroll cost calculator.
Who makes a good trades office manager?
- An office manager from another trades or construction company. Knows job costing, permits and the rhythm of seasons.
- A service manager or senior CSR who's ready to lead and already knows your customers.
- A medical or dental office manager. Used to scheduling, billing, insurance paperwork and busy front desks.
- A bookkeeper who wants to grow, if they're comfortable managing people.
O*NET reports that 45% of office supervisor job listings require a bachelor's degree, but in small trades shops experience and organization usually matter more than a degree. Decide which you actually need before posting.
How do you test an office manager candidate?
Give them a paperwork in-basket: three real-world items to handle in 30 minutes, then talk through what they did. Remove customer names and real numbers first.
- 1
An aging report.
Ten open invoices from 15 to 95 days old. Ask: which three do you call first, and what do you say?
- 2
A payroll exception.
A tech's timesheet shows 47 hours and a $200 bonus. Ask how they'd process it and what they'd check. Listen for overtime and the regular rate, and for when they'd ask the payroll provider.
- 3
An angry email.
A customer disputes a $1,400 invoice, saying the tech was only there an hour. Ask for a written reply.
- 4
Debrief.
Ask what they'd fix so these don't happen again. The best candidates go from the task to the process.
| Question | Strong answer | Red flag |
|---|---|---|
| How do you keep receivables from aging? | Invoice same day, payment at the job, reminder cadence, personal calls by day 45 | "Send statements monthly" |
| Tell me about a time you had to correct an employee. | Private, specific, followed up | Avoids conflict or handled it publicly |
| What accounting software have you used? | Names tools and specific tasks (reconciliations, job costing) | Vague |
| What would you want on a weekly report to the owner? | Sales, cash, receivables, open estimates, staffing issues | Doesn't know |
| How do you decide what to escalate to the owner? | Clear rules: money over a set amount, legal issues, safety | Everything, or nothing |
What should the first 90 days look like?
| By day | Takes over | Owner stops doing |
|---|---|---|
| 30 | Daily invoicing, payment posting, timesheet collection | Sending invoices |
| 60 | Collections calls, payroll prep, vendor accounts | Chasing payments and payroll |
| 90 | Office team supervision, weekly owner report, insurance and license renewals | Managing the office day to day |
Write down how each area works today before you hand it over, even if it's messy. The contractor bookkeeping checklist and the QuickBooks setup guide make good starting documents.
Frequently asked questions
When should a contractor hire an office manager?
When paperwork is costing money or owner time: invoices go out late, receivables over 60 days keep growing, payroll errors repeat, and the owner works nights on admin. If office staff need someone to report to while the owner is in the field, that's another strong sign.
What does an office manager do in a construction or trades company?
Owns billing, collections, payroll prep, vendor and insurance paperwork, and the office team, such as CSRs and dispatchers. They also give the owner a regular picture of sales, cash and receivables. In smaller shops they often do the bookkeeping themselves.
Do I need an office manager or a bookkeeper?
If the gap is recording transactions and reconciling accounts, hire a bookkeeper, full- or part-time. If you also need someone to run people, customers and vendors, hire an office manager. BLS medians at specialty trade contractors are $25.99 for bookkeeping clerks and $33.42 for office supervisors.
Is office manager a growing job?
BLS projections republished by O*NET show little or no change in employment for office supervisors from 2025 to 2035, but about 127,400 openings a year as people retire or change jobs. Good candidates are available, though experienced trades office managers are harder to find.
Does an office manager need a degree?
Not for most small trades shops. O*NET reports that 45% of office supervisor listings ask for a bachelor's degree, but experience with billing, payroll and managing a small team usually matters more. Test the skills with a paperwork exercise rather than relying on credentials.
Related
- How Much to Pay an Office Manager at a Trades Company in 2026Office manager pay for trades shops from BLS May 2025: $33.42 median for office supervisors at trade contractors, state wages, salary vs hourly, full cost.
- Office Manager Job Description for a Contracting or Trades CompanyCopy-ready office manager job description for HVAC, plumbing and electrical shops: billing, collections, payroll prep, team lead duties and a pay range.
- Hiring a Dispatcher: When You Need One and How to Pick the Right PersonWhen a home service shop needs a dispatcher, what the job covers, what to pay, how to test candidates with a live board exercise, and a 90-day scorecard.
- Hiring a Customer Service Representative: A Guide for Trades OwnersHow to hire a CSR for an HVAC, plumbing or electrical shop: when you need one, what to pay, a job description outline, interview questions, a mock call.
- Bookkeeping Checklist for Contractors (Weekly, Monthly, Year-End)A weekly, monthly, quarterly and year-end bookkeeping checklist for contractors: reconciliations, job costing, A/R review, WIP, estimated taxes and 1099s.
- How to Set Up QuickBooks for a Contracting BusinessSet up QuickBooks Online for a contracting business: pick a plan, build a trades chart of accounts, turn on projects and classes, and keep job costs clean.
- What Is Accounts Payable?Accounts payable for contractors: how A/P works with supply houses and subs, DPO formula, early-pay discount math, by-trade examples and common mistakes.
- Contractor invoicing software that sends the invoice and chases the moneyTurn finished jobs into invoices the same day, send polite automatic reminders on unpaid ones, and sync invoices and payments to QuickBooks.
- QuickBooks for contractors: the right version, real job costing and a sync that keeps the books matched to the jobsQuickBooks for contractors: Online vs Desktop, job costing with projects and classes, sync pitfalls, and how BRIX keeps QuickBooks matched to your jobs.
- True Cost of an Employee Calculator for Trades BusinessesSee what an hourly employee really costs: wages, 7.65% employer FICA, FUTA, SUTA, workers' comp and benefits, per paid and per billable hour.
Sources
- BLS OEWS May 2025: First-Line Supervisors of Office and Administrative Support Workers (43-1011), national estimates (checked October 24, 2026)
- BLS OEWS May 2025: Bookkeeping, Accounting, and Auditing Clerks (43-3031), national estimates (checked October 24, 2026)
- BLS OEWS May 2025: Specialty Trade Contractors (NAICS 238000) occupational estimates (checked October 24, 2026)
- BLS OEWS May 2025: State occupational employment and wage estimates (checked October 24, 2026)
- O*NET OnLine: First-Line Supervisors of Office and Administrative Support Workers (43-1011.00), tasks, education and BLS 2025–35 projections (checked October 24, 2026)