Workers Comp Calculator

Price coverage by payroll class, risk, and location. Spot premium drivers and compare savings scenarios. Build confident budgets with clear premium breakdowns always today.

Inputs
Add payroll classes, apply modifiers, credits, add-ons, and charges.
For reporting only in this estimator.
1.00 is average. Lower indicates better performance.
Used with a small claims adjustment.
Optional inputs for the schedule adjustment.
Higher totals can increase the adjustment.
Prorates premium base and percent charges.
Applies to adjusted payroll for each class.
Models payroll audit changes after term end.
Set 0 for no cap.

Credits and discounts
Enter percentages to reduce premium after modifiers.

Add-ons
Enter percentages to increase premium after credits.

Charges and fees
Percent charges apply to premium base. Flat fees remain full.

Payment plan
Adds installment fees or applies pay-in-full discount.

Output controls

Payroll classes
Adjusted payroll = regular + overtime × factor, then growth and audit.
Class code Description Regular ($) Overtime ($) OT factor Rate / $100
How to use Formula used
How to use this calculator
  1. Add each payroll class line for your workforce.
  2. Enter regular and overtime payroll and an overtime factor.
  3. Set the rate per one hundred dollars of payroll.
  4. Enter experience modifier and schedule factor for pricing.
  5. Add credits, endorsements, taxes, fees, and payment plan options.
  6. Press Calculate to view totals, charts, exports, and schedule.
Formula used
1) Adjusted payroll per class
AdjustedPayroll = (Regular + Overtime × OTFactor) × (1+Growth) × (1+AuditVariance)
2) Manual premium per class
Manual = (AdjustedPayroll ÷ 100) × Rate
3) Modified premium
Modified = Σ(Manual) × ExperienceMod × EffectiveScheduleFactor
4) Credits and add-ons
AfterCredits = Modified × Π(1 − Credit%)
AfterAddons = AfterCredits × Π(1 + Addon%)
5) Percent charges and fees
TermTotal = max(MinPremium, ProratedBase + PercentCharges + FlatFees ± PlanAdjustments)
Claim inputs adjust schedule factor slightly for scenario testing.
Example data table
Use these sample values to test the calculator.
Class code Description Regular Overtime OT factor Rate / $100
8810Clerical office employees$150,000$00.500.35
8017Retail store employees$230,000$20,0000.501.25
5606Contractor field employees$280,000$20,0000.506.50
Sample modifiers
  • Experience modifier: 1.00
  • Schedule factor: 1.00
  • Assessments: 3.5%
  • Expense constant: $160
Sample advanced options
  • Managed care credit: 2%
  • Waiver of subrogation: 3%
  • Premium tax: 2%
  • Monthly plan with $5 installment fee

Payroll class design and rating signals

Workers compensation premium begins with payroll assigned to class codes. Each class reflects expected injury frequency and severity. Separate clerical, sales, field, and high‑hazard operations so risk is not blended. Enter regular and overtime payroll, then apply an overtime factor to charge only the straight‑time portion when applicable. Use payroll growth and audit variance to test realistic changes before renewal.

Manual premium and modifier mechanics

Manual premium is computed per class as adjusted payroll divided by 100, multiplied by the rate per 100. The experience modifier then scales the total based on historical losses versus peers. A value below 1.00 generally indicates stronger performance, while values above 1.00 increase cost. The schedule factor models discretionary credits or debits tied to underwriting review, safety practices, and documentation quality. Claim count and paid losses can be used for stress testing scenarios.

Credits, programs, and endorsements

Many programs reduce premium after modifiers. Examples include safety discounts, deductible credits, managed care credits, drug‑free workplace credits, and return‑to‑work credits. Carriers often apply credits sequentially, so the calculator treats them multiplicatively rather than as a simple sum. Contractual endorsements may add cost, such as waiver of subrogation, which you can model as add‑ons for side‑by‑side comparisons across vendors.

Taxes, assessments, and flat fees

Beyond premium, policies may include assessments, catastrophe charges, state surcharges, and premium taxes. Percent charges apply to the premium base for the selected term, while flat charges such as expense constants, administrative fees, and broker fees are shown separately. A minimum premium floor prevents unrealistic outcomes for very small payrolls or short terms and supports budget guardrails.

Payment planning and decision support

Cash flow matters as much as the annualized figure. Use payment plan options to model pay‑in‑full discounts, down payments, installment fees, and monthly or quarterly schedules. The charts highlight cost concentration by class and timing by payment. Export CSV for audit trails and PDF for approvals, then validate final pricing using broker and carrier documents during binding.

FAQs

1) What rate should I enter for each class?

Use the rate shown on a quote, worksheet, or state filing reference. Rates vary by insurer and may change at renewal. If unsure, start with a recent proposal and adjust for scenario testing.

2) Why does overtime use a factor?

Many programs charge overtime payroll at the straight-time portion only. The factor estimates that portion, often 0.5, but your rules may differ. Adjust it to match your carrier instructions.

3) How do experience mod and schedule factor differ?

The experience modifier reflects historical losses compared with peers. The schedule factor is a discretionary adjustment based on qualitative underwriting items. Both multiply the manual premium, so small changes can have large impacts.

4) Are credits added together or applied one by one?

Credits frequently apply sequentially, which is multiplicative. For example, two 5% credits do not always equal 10% total reduction. This calculator applies each credit as a separate factor for realism.

5) What is annualized premium?

Annualized premium normalizes the term estimate to a 12-month equivalent. It helps compare quotes with different policy terms. It is not a bill amount unless your policy term is twelve months.

6) Can I use this for compliance or final pricing?

No. This is an educational estimator for budgeting and scenario analysis. Final premium depends on insurer rules, audits, endorsements, and state requirements. Confirm inputs with your broker or carrier documents.

Related Calculators

Workers comp class calculatorWorkers comp base calculatorEMR impact calculatorWorkers comp audit calculatorDeposit premium calculatorInstallment payment calculatorMinimum premium calculatorOvertime impact calculatorSubcontractor cost calculatorOwner inclusion calculator

Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.