Most business owners know their payroll number cold. But labor burden—the full cost of employing someone beyond their base wage—is where the real money hides. And when you’re evaluating a PEO, understanding how they shift your labor burden calculation is the difference between making an informed decision and getting surprised by costs you didn’t anticipate.
This guide walks you through calculating your current labor burden, then shows you exactly how to recalculate it under a PEO arrangement. You’ll see which costs disappear, which get bundled into PEO fees, and which stay on your books. By the end, you’ll have real numbers to compare—not sales pitches.
Step 1: Document Your Current Gross Wages by Employee Category
Start with your actual payroll data from the last 12 months. Not what you budgeted. Not what you think you spent. Pull the real numbers from your payroll system.
Segment your employees into clear categories: full-time salaried, full-time hourly, part-time, seasonal. This matters because PEO fees are typically calculated as a percentage of gross wages or a per-employee-per-month charge. If you’re lumping everyone together, you can’t accurately project what a PEO will actually cost you.
Here’s where business owners commonly mess this up: they include owner draws or contractor payments in their gross wage calculation. Don’t do that. PEOs cover W-2 employees. Your 1099 contractors aren’t part of the equation, and owner compensation is handled separately depending on your business structure.
Create a simple spreadsheet with these columns: employee category, number of employees, total annual gross wages, average wage per employee. If you have high turnover, note that too—it affects both your current burden calculation and how a PEO will price your account.
Why does this level of detail matter? Because PEO pricing isn’t one-size-fits-all. A company with 15 full-time employees making $60,000 each will get quoted differently than a company with 15 part-time employees making $25,000 each—even though both have 15 employees. The gross wage base drives everything downstream.
If you’re pulling data from multiple payroll periods, watch for anomalies. That one-time bonus payout in December? Include it—it’s part of your true wage base. Severance payments? Those count too. You want the full picture of what you’re actually spending on wages, because that’s what determines your labor burden rate.
One more thing: if you’ve had significant employee changes in the last year—major hires, layoffs, or wage increases—consider whether your current payroll reflects your ongoing reality or a transition period. PEOs will quote based on your projected ongoing headcount, so make sure your baseline data matches what you expect going forward.
Step 2: Calculate Your Current Statutory Labor Costs
Now we’re getting into the mandatory costs that every employer pays. Start with employer-side payroll taxes, which are non-negotiable regardless of whether you use a PEO.
FICA is straightforward: 6.2% for Social Security on wages up to the annual cap (currently $168,600 for 2024), plus 1.45% for Medicare on all wages. If you have high earners, you’ll also hit the additional Medicare tax threshold. Calculate this across your entire wage base from Step 1.
FUTA—Federal Unemployment Tax—is 0.6% on the first $7,000 of each employee’s wages, assuming you get the full state unemployment tax credit. For most businesses, this is a small line item, but document it anyway.
Here’s where it gets interesting: SUTA, your State Unemployment Tax. Don’t use industry averages here. Pull your actual rate from your state’s unemployment insurance documentation. It varies wildly based on your claims history, industry classification, and how long you’ve been in business.
New businesses often get assigned a standard new employer rate. Established businesses get experience-rated. If you’ve had unemployment claims, your rate is higher. If you’ve had clean history, it’s lower. This is one of the first places PEOs can potentially save you money—they often have better pooled rates because they’re managing thousands of employees with professional claims management.
But you need to know your current rate to measure that savings. If you’re currently paying 2.5% SUTA and a PEO can get you to 1.2%, that’s real money on a large wage base. If you’re already at 0.8% because you’ve had zero claims for years, a PEO might not improve it much.
Workers’ compensation is the other big variable cost here. Pull your current premium and your experience modification rate (your “mod”). Your mod compares your claims history to other businesses in your industry. A mod of 1.0 is average. Below 1.0 means you’re safer than average and get a discount. Above 1.0 means you’ve had claims and pay a penalty.
Calculate your effective workers’ comp rate as a percentage of payroll. This requires knowing your classification codes and the rate for each code. If you’re paying $45,000 annually in workers’ comp premiums on $1 million in payroll, that’s a 4.5% burden. Understanding how PEO workers compensation management works can help you evaluate whether pooled coverage makes sense for your situation.
PEOs often improve workers’ comp costs through pooled purchasing power and better safety programs. But if you’re in a low-risk industry with a great mod, the improvement might be minimal. Document your current reality so you can compare accurately.
Add up these statutory costs: FICA, FUTA, SUTA, and workers’ comp. Express it both as a total dollar amount and as a percentage of your gross wages. This is your statutory labor burden baseline.
Step 3: Itemize Your Benefits and Voluntary Compensation Costs
Benefits costs are where small business owners often underestimate their true labor burden. It’s not just the premium you’re paying—it’s the hidden administrative weight that comes with it.
Start with health insurance. Document your employer contribution per employee per month. If you’re covering 75% of employee-only premiums and 50% of family coverage, break that out. Don’t just use an average—some employees cost you $400/month, others cost you $1,200/month depending on their plan elections.
Then add retirement plan costs. If you’re matching 3% of salary, calculate what that actually costs you annually across all participating employees. Don’t forget the plan administration fees—those annual charges from your 401(k) provider, the compliance testing fees, the recordkeeping costs. They’re part of your benefits burden even if they don’t feel like it.
Dental and vision are usually smaller line items, but include them. Life insurance, short-term disability, long-term disability—if you’re paying for it, it counts. HSA or FSA contributions you’re making on behalf of employees? Those too.
Here’s what most business owners miss: the broker fees and administrative overhead. If you’re paying a benefits broker 3-5% of premiums as commission, that’s part of your cost. If your office manager spends 10 hours a month managing benefits enrollment, answering employee questions, and handling COBRA administration, assign a dollar value to that time.
COBRA administration alone is a hidden cost. You’re legally required to offer it, track it, and manage it. Most small businesses either pay a third-party administrator or eat the internal time cost. Either way, it’s real money. Learning how PEO benefits administration handles these tasks can help you quantify what you’d be offloading.
Now here’s the reality check on PEO impact: benefits costs through a PEO vary significantly based on your current situation. If you’re a 12-person company with a couple of high-cost claims, you’re probably getting hammered on renewals. A PEO’s pooled health plan might save you 15-25% because you’re spreading risk across thousands of employees.
But if you’re a 50-person company with good claims history and strong employee demographics, you might not see much improvement. Some businesses even see slight increases on certain benefits when moving to a PEO’s master policy.
The administrative savings are more predictable. Benefits enrollment, compliance tracking, employee communications—that largely transfers to the PEO. But you need to quantify what you’re currently spending to measure the value of that transfer.
Total up your benefits costs: premiums, employer contributions, plan admin fees, broker costs, and internal time. Express it as an annual dollar amount and as a percentage of gross wages. This is your benefits burden baseline.
Step 4: Quantify Your Hidden Administrative Labor Costs
This is the section where business owners either lowball the numbers or inflate them with wishful thinking. Be honest about what’s truly recoverable.
Start with payroll processing. How much time does someone spend each pay period entering hours, reviewing for errors, processing the run, and handling exceptions? If your office manager does this and makes $55,000 annually, and payroll takes 6 hours per pay period, that’s about $3,000 annually in labor cost just for payroll processing.
Add your payroll service fees. Most small businesses pay $500-2,000 annually for basic payroll processing. That’s a hard cost that typically disappears under a PEO. Understanding what’s included in PEO payroll services helps you compare apples to apples.
Benefits enrollment and administration is the bigger time sink. Open enrollment alone can consume 20-40 hours annually for a small business. Add ongoing employee questions, life event changes, carrier communications, and compliance documentation. Assign a dollar value based on who’s doing this work and their hourly cost.
Compliance filings and reporting: quarterly tax filings, annual W-2s and 1099s, new hire reporting, unemployment claims responses, workers’ comp audits. If you’re handling this internally, quantify the time. If you’re paying your accountant or payroll provider to do it, include those fees.
Workers’ comp claims management is often underestimated. When an employee gets injured, someone has to manage the claim, communicate with the carrier, handle modified duty arrangements, and track medical appointments. That’s real time with real cost.
HR software and compliance tools add up too. If you’re paying for an HRIS, applicant tracking system, or compliance training platform, those are costs that might be redundant under a PEO.
Here’s the honesty test: if your office manager handles HR among five other responsibilities, you can’t claim you’ll eliminate their entire salary by moving to a PEO. You’ll still need someone to interface with the PEO, handle employee questions, and manage internal processes. Be realistic about what portion of their time is truly recoverable.
A reasonable estimate: most small businesses can recover 30-50% of their HR administrative time under a PEO, not 100%. The PEO handles the transactional and compliance work, but you still need internal oversight.
Total your administrative costs: internal labor time, payroll service fees, HR software subscriptions, compliance training, broker fees. This is your administrative burden baseline.
Step 5: Build Your Total Current Labor Burden Rate
Now you’re putting it all together. This is your baseline—the number you’ll compare against PEO pricing.
The formula is straightforward: add your total statutory costs from Step 2, your total benefits costs from Step 3, and your total administrative costs from Step 4. Divide that sum by your total gross wages from Step 1. The result is your labor burden rate as a percentage.
Let’s say you have $1 million in annual gross wages. Your statutory costs (FICA, FUTA, SUTA, workers’ comp) total $140,000. Your benefits costs total $180,000. Your administrative costs total $35,000. That’s $355,000 in total burden costs, which equals a 35.5% burden rate.
Calculate both your aggregate burden rate and your per-employee average. If you have 20 employees with $1 million in total wages, your average per-employee burden cost is $17,750 annually, or about $1,479 per month.
For context, most small businesses see burden rates between 20-40% on top of gross wages. If you’re below 20%, you’re either in a low-benefit, low-risk industry, or you’re not capturing all your costs. If you’re above 40%, you’re either in a high-risk industry with expensive workers’ comp, or you’re carrying heavy benefits costs.
Document this calculation clearly. You’ll need it for comparison when you start looking at PEO quotes. A detailed PEO ROI and cost-benefit analysis requires this baseline to be accurate.
One important note: this burden rate doesn’t include employee wages themselves. It’s the cost on top of wages. When you’re budgeting for a new hire at $50,000, your true cost is $50,000 plus your burden rate. At 35%, that employee actually costs you $67,500.
Step 6: Map PEO Fee Structure Against Your Current Cost Categories
This is where you move from theory to real decision data. You need actual PEO quotes with detailed fee breakdowns—not ballpark estimates from a sales call.
PEO pricing typically comes in one of two structures: a percentage of gross payroll (usually 2-8%) or a per-employee-per-month fee (typically $100-250 per employee). Some PEOs use a hybrid model. Get quotes from multiple PEOs so you can compare structures.
Here’s what you need to know from each quote: What’s included in the administrative fee? Is workers’ comp bundled or passed through at cost? What SUTA rate will apply to your account? Are health insurance premiums pooled or experience-rated? What’s not included that you’ll still pay for?
The administrative fee usually covers payroll processing, tax filing, benefits administration, HR support, and compliance assistance. But the details matter. Does “HR support” mean unlimited phone access or just a help desk? Does benefits administration include full enrollment support or just access to a portal?
Workers’ comp is often the biggest variable in PEO quotes. Some PEOs bundle it into their admin fee at a blended rate. Others pass it through at cost based on your specific classification codes. Ask for the specific rate they’ll charge for each of your class codes, and compare it to what you’re currently paying.
SUTA rates under a PEO can be tricky. In most states, your employees will be reported under the PEO’s unemployment account, which often has a better rate than yours. But some states require you to maintain your own account even under a PEO. Ask specifically what SUTA rate will apply and whether it’s guaranteed or subject to change.
Benefits costs through a PEO need careful comparison. You’ll typically get access to their master health plan with pooled rates. For some businesses, this is a significant savings. For others, it’s a wash or even an increase. Get actual premium quotes for your employee demographics—not generic examples.
Watch for setup fees, implementation costs, and contract minimums. Some PEOs charge $2,000-5,000 in setup fees. Others waive them. Some require minimum employee counts or minimum revenue commitments. These affect your true first-year cost.
Contract terms matter too. Most PEO contracts are annual with auto-renewal. Some have early termination fees. Some lock you into rate increases tied to specific indices. Read the fine print before you calculate costs. Our PEO contract negotiation guide covers what to watch for in these agreements.
Create a side-by-side comparison spreadsheet. Column one: your current costs by category. Column two: PEO costs by category. Line items should include: payroll processing, tax filing, workers’ comp, SUTA, benefits premiums, benefits administration, HR support, compliance tools, and any remaining internal costs.
This is your decision matrix. Not a sales pitch. Not industry averages. Your actual costs compared to actual PEO quotes for your specific business.
Step 7: Calculate Your Projected Labor Burden Under PEO
Now you’re ready to calculate what your labor burden would look like under a PEO arrangement. This isn’t guesswork anymore—you have real data.
Start with the PEO’s administrative fee. If they’re charging 4% of gross payroll and your annual wages are $1 million, that’s $40,000. If they’re charging $150 per employee per month and you have 20 employees, that’s $36,000 annually.
Add the passed-through statutory costs. FICA still applies—that’s not changing. FUTA still applies. But your SUTA rate might be lower under the PEO’s account. If you’re currently paying $25,000 annually in SUTA and the PEO rate drops you to $12,000, that’s a $13,000 savings.
Workers’ comp costs under the PEO need to be calculated based on their quoted rates for your classification codes. If you’re currently paying $45,000 and the PEO’s rate drops you to $32,000, that’s another $13,000 savings. But if their rate is comparable to yours, don’t assume savings that aren’t there.
Benefits costs through the PEO should be based on actual premium quotes, not estimates. If your current employer health insurance contribution is $180,000 annually and the PEO’s pooled plan drops it to $150,000, that’s $30,000 in savings. But if it stays flat or increases, factor that in honestly.
Here’s the part most businesses forget: you won’t eliminate all internal administrative costs. You’ll still need someone to manage the PEO relationship, handle employee questions that require internal knowledge, and oversee compliance even though the PEO is doing the heavy lifting.
A realistic estimate: you’ll recover 40-60% of your current administrative labor costs, not 100%. If you’re currently spending $35,000 in internal time and external fees on HR administration, you might realistically save $18,000-21,000 under a PEO, not the full $35,000.
Add it all up: PEO administrative fees, passed-through statutory costs at the new rates, benefits costs through the PEO, and your remaining internal admin costs. Divide by your gross wages. That’s your projected labor burden rate under the PEO. Building a PEO savings projection model helps you stress-test these numbers against different scenarios.
Compare the two burden rates side by side. If your current burden is 35.5% and your projected burden under the PEO is 31%, that’s a 4.5 percentage point reduction. On $1 million in wages, that’s $45,000 in annual savings.
But don’t stop at the percentage. Look at the absolute dollar difference and what you’re getting for it. A PEO might cost you $10,000 more annually but eliminate 15 hours a week of administrative work and transfer significant compliance risk. That might be worth it even though the burden rate increased slightly.
Or a PEO might save you $30,000 annually but provide minimal service improvement beyond what you’re already getting from your payroll provider and benefits broker. That’s a different value proposition.
The burden rate comparison gives you the cost data. You still need to weigh it against service improvements, risk transfer, and whether the PEO model actually fits how your business operates.
Making the Decision With Real Numbers
You’ve documented current gross wages by employee type. You’ve calculated actual statutory costs with your real SUTA and workers’ comp rates. You’ve itemized benefits costs including hidden admin fees. You’ve quantified internal HR time costs honestly. You’ve built your current burden rate percentage.
You’ve gotten detailed PEO quotes and mapped costs category-by-category. You’ve calculated projected burden rate under PEO. The difference between these two burden rates—adjusted for any service improvements or risks—is your real decision data.
This isn’t about whether PEOs are good or bad. It’s about whether a PEO improves your specific labor burden calculation enough to justify the change. For some businesses, the answer is clearly yes. For others, it’s clearly no. For many, it depends on which PEO you’re comparing and what you’re trying to solve.
If you want help comparing multiple PEO quotes against your specific burden calculation, that’s exactly what PEO Metrics does. Before you sign that PEO renewal, make sure you’re not leaving money on the table. Many businesses unknowingly overpay because of bundled fees, hidden administrative markups, and contracts designed to limit flexibility. We give you a clear, side-by-side breakdown of pricing, services, and contract terms—so you can see exactly what you’re paying for and choose the option that truly fits your business. Don’t auto-renew. Make an informed, confident decision.
