# How do insurance companies price small business health insurance?

Source: https://www.getprescience.com/guides/how-carriers-price-health-insurance
Author: Aditya Jain, MD, Cofounder and COO, Prescience
Published: 2026-10-31
Updated: 2026-10-31
Cite as: Aditya Jain, MD. "How do insurance companies price small business health insurance?." Prescience, October 31, 2026. https://www.getprescience.com/guides/how-carriers-price-health-insurance

ACA-compliant fully insured small-group premiums cannot vary by your company's health status or claims. For a given product, federal rules permit age, tobacco, geography and family variation, subject to state restrictions. Large-group and underwritten arrangements can use different methods. I first identify the market, then separate plan rates, member factors and enrollment changes.

- **Allowed rating factors:** Age, tobacco, location, family size
- **Age band limit:** Up to 3:1 for adults
- **Small group MLR floor:** 80%
- **2027 group medical trend:** 9.0% (PwC)

## Which pricing rules apply to your company

The federal small-employer definition generally covers 1–50 employees, and states can extend it to 100. California, New York and Vermont use the expanded market. Colorado changed to 1–50 for 2026, with transition provisions for some existing 51–100 groups. Market-size counting and timing are not interchangeable with the ACA employer-mandate test; confirm both separately.

**How each kind of plan is priced**

| Arrangement | Who it's for | What sets your price |
| --- | --- | --- |
| ACA small group (fully insured) | Generally 1–50; some states extend to 100; Colorado transition rules apply | Carrier's pooled base rate, adjusted only for age, tobacco, area and who is covered. Your claims don't count. |
| Large group (fully insured) | 51+ (or 101+) employees | May blend group claims with manual rates and other permitted factors; method varies |
| Level-funded | Small and midsize groups; minimums vary by carrier | Medical underwriting: health questionnaires or prior claims, plus your census. |
| PEO master plan | Companies that join the PEO | Depends on the offered plan, market rules and PEO contract; do not assume every PEO uses one method |
| ICHRA | Any size | Individual market rates for each employee, which use the same ACA age, tobacco and area rules. |

## The four ACA rating factors

- **Age:** premiums can rise with age, up to three times as much for a 64-year-old as for a 21-year-old.
- **Tobacco:** federal maximum 1.5:1, with stricter state limits possible and wellness-program requirements in small-group coverage.
- **Location:** carriers set rates by geographic rating area, usually groups of counties or ZIP codes.
- **Family coverage:** federal per-member rating generally sums covered members, subject to the child cap; community-rated states can use approved family tiers.

Health status, claims history, gender, industry and group size can't be used in the small group market. Some states go further: New York and Vermont require pure community rating with no age adjustment, and use fixed family tiers instead (in New York, two adults with children pay 2.85 times the single rate).

**Federal default age curve (age 21 = 1.000). States without their own curve use these factors.**

| Age | Factor | Age | Factor |
| --- | --- | --- | --- |
| 0–14 | 0.765 | 40 | 1.278 |
| 18 | 0.913 | 45 | 1.444 |
| 21–24 | 1.000 | 50 | 1.786 |
| 25 | 1.004 | 55 | 2.230 |
| 30 | 1.135 | 60 | 2.714 |
| 35 | 1.222 | 64 and older | 3.000 |

At age 40 the default factor is 1.278, about 28% above age 21; at 55 it is 2.230. The effect of an older hire depends on whom the hire adds to or replaces in the census, not a universal rule about the number of younger employees. States can use different permitted curves. Confirm the applicable state method rather than treating this federal table as a quote.

**Selected state tobacco limits shown in the CMS state-rating table; confirm current state/product rules**

| Tobacco ratio | States |
| --- | --- |
| No tobacco surcharge (1:1) | California, District of Columbia, Massachusetts, New Jersey, New York, Rhode Island, Vermont; Connecticut small group |
| 1.15:1 | Colorado |
| 1.2:1 | Arkansas; North Carolina small group |
| 1.4:1 | Kentucky |
| Up to 1.5:1 | Most other states |

> **Only the three oldest children count:** Under federal per-member rating, at most the three oldest covered children under age 21 count toward a family premium. Covered adults and children aged 21 or older are separate. State-specific family-tier methods can differ. This is a premium rule, not a limit on the number of children eligible for coverage.

## How the base rate is set

An ACA small-group issuer develops its index rate using the expected claims costs of its state small-group risk pool. Permitted adjustments then produce product and member rates. A simplified explanation groups the cost inputs as follows; this is not a substitute for the insurer's actual rate filing:

- **Medical trend:** projected changes in prices and utilization. PwC's 2027 report projects 9.0% group trend for 2027 and restates 2026 group trend to 9.0%, up from its earlier 8.5% estimate. These forecasts are not guaranteed policy renewals.
- **Administration:** claims processing, customer service, technology.
- **Distribution:** broker commissions and general agency fees.
- **Taxes and fees:** state premium taxes and federal fees.
- **Profit or contingency margin.**

Product benefits, network and permitted geographic/member factors affect the final premium. Small-group rates can change with the effective quarter, subject to applicable rules. Request the exact filing and effective date from the insurer or state regulator. A public filing's average increase is not necessarily the percentage for your product or census.

Federal MLR standards generally use an 80% minimum in individual/small-group markets and 85% in large group, with statutory adjustments and multi-year averaging. The calculation is at insurer/state/market level, not a claim-spending target for each employer. Applicable rebates do not establish that your group's unused premium is refundable, and 20% is not simply a profit allowance.

## Worked example: pricing an 8-person team

**One small group plan, priced member by member**

Illustrative. An 8-employee company in a state using the federal age curve. The carrier's base rate for the chosen plan in this area is $430 a month for a 21-year-old. Employees are 25, 29, 31, 34, 38, 42, 47 and 55. The 42-year-old covers a 40-year-old spouse and two children under 14. No tobacco users. The children are ages 8 and 10, so they remain in the 0–14 band at renewal. The rate and 9% increase are fictional assumptions, not a quoted product or forecast.

- Age 25 employee (1.004): $431.72
- Age 55 employee (2.230): $958.90
- Age 42 family: 1.325 + 1.278 + 0.765 × 2: $1,777.19
- Eight employee factors: 1.004 + 1.119 + 1.159 + 1.214 + 1.246 + 1.325 + 1.563 + 2.230: 10.860
- Sum of all 11 member factors: 13.668
- Total monthly premium (13.668 × $430): $5,877.24
- Next year: everyone one year older, factors sum to: 13.983 (+2.3%)
- Next year: base rate after 9% trend: $468.70
- Next year: total monthly premium (13.983 × $468.70): $6,553.83

The calculated renewal is 11.51% higher: a 9% rate assumption compounded with a 2.30% increase in summed age factors. It is not simply their sum. Some composite billing methods average member rates into tiers; approved state methods can differ.

Replacing the age-55 factor of 2.230 with the age-28 factor of 1.087 reduces this fictional monthly total by $491.49 at a $430 unit rate. That is a census change, not a health-status discount. A different rating area could also change the unit rate, but its direction must come from the actual filing.

**Price the people on your own employee list**

Age, home ZIP and family mix can change the total. Use your actual census for a proposal, and keep the pricing rules for each funding arrangement separate when comparing results.

[Get a quote for my actual team](https://www.getprescience.com/quote)

## How large groups are priced on their own claims

Large-group insurers may consider experience rating: adjusting available claims for expected changes and blending them with broader pricing assumptions. The weight assigned to group experience, treatment of large claims and other permitted factors vary by insurer, group and jurisdiction. Request an explanation instead of assuming every large group receives the same formula.

**A large group renewal, simplified**

Fictional simplified weighting exercise, not an insurer quote. A 150-employee company has a $700 per-member monthly manual estimate and a comparable $780 experience estimate. Assume both are on the same cost basis before trend, with 60% experience weight and 9% trend. Exclude other pricing adjustments.

- Own experience × 60%: $468.00
- Manual rate × 40%: $280.00
- Blended rate: $748.00
- Trended forward 9%: $815.32

The blended, trended estimate is $815.32, about 16.5% above the untrended $700 manual input. This illustrates weighting only. In practice, ask how the carrier treats large claims, administrative costs, timing and uncertainty before treating any experience calculation as a premium.

Past claims do not settle next year's price. The insurer's expected future costs, pooling assumptions and contract terms matter. An employer can request an explanation and alternative quotes without asking coworkers for medical details or assuming that a diagnosis explains a particular percentage increase.

> **Edge case: crossing the small group line:** Confirm the state definition, counting period and renewal treatment before assuming growth changes markets. Colorado's 2026 change has a transition path for qualifying existing 51–100 groups, potentially lasting five years from issuance, with limits on switching. Ask the insurer to document how the rules apply to the specific policy.

## What's different for PEOs and level-funded plans

- **PEO proposals:** identify the actual policy, pricing basis, included services and renewal terms. If an introductory discount exists, ask for its expiration in writing. Do not infer the cause of a renewal from the PEO label.
- **Level-funded proposals:** medical underwriting and stop-loss terms can affect availability and price. Check claims obligations, exclusions, surplus conditions and termination exposure. Scheduled payments do not by themselves describe maximum employer liability.
- **ICHRA:** individual premiums follow applicable individual-market rating rules; the employer sets a compliant reimbursement offer. Compare actual local products and tax-credit effects instead of applying a national rate-change headline to every employee.

Different arrangements allocate obligations differently. I would compare current cost, renewal uncertainty, covered services and employee access using the same census. A low first-year figure is not proof of durable savings, and a general statement about a healthy workforce cannot replace the actual underwriting and contract review.

## What you can actually change

1. **Send a clean census** Submit accurate dates of birth, locations and proposed enrollment through a secure process. Supply only information required for that product and pricing method. Reconcile quote assumptions with final enrollment before accepting the bill.
2. **Price more than one plan design** Request several available benefit designs, ideally on the same network. Compare employee cost sharing and employer annual expense as well as the premium difference.
3. **Check the network factor** Ask for comparable network options and verify important providers and remote locations. A network label does not establish either price or access.
4. **Pick the start date on purpose** Because small group rates can change quarterly, quote the plan for the start date you'll actually use.
5. **Compare across markets** Get at least one quote from a different kind of arrangement: ACA small group, level-funded or another option. They price on different inputs, so the gap can be large.

For what renewals look like in practice, see [why did our health insurance renewal go up](https://www.getprescience.com/guides/why-did-our-health-insurance-renewal-go-up). For current averages, see [average employee health insurance cost](https://www.getprescience.com/guides/average-employee-health-insurance-cost).

## How we price

Prescience sets one monthly cost in the quote before the plan starts. Compare that written cost and the proposed benefits with the alternatives; it does not establish a future multi-year renewal guarantee.

At Prescience, we design and run your company's health plan, from setup and enrollment to claims, compliance and COBRA. What your team gets:

- **An effective $0 deductible,** so the plan helps from the first visit.
- **Simple copays** shown before a visit, capped by a low out-of-pocket maximum.
- **A broad national PPO network,** plus providers we contract with directly.
- **24/7 physician-led care navigation:** a care team that finds the right provider, books appointments and explains costs up front.

What your company gets: one monthly cost set in your quote, usually 10–20% below comparable fully insured coverage and fixed before the plan starts, with no admin fees. You keep your payroll provider, and the plan can start mid-year.

> **Prescience Diamond: A company health plan with an effective $0 deductible.** Instead of a rate built from your team's ages each renewal, a Diamond quote gives you one monthly cost for the plan year, set before the plan starts.
> - **An effective $0 deductible** and simple copays shown before a visit
> - **A broad national PPO network,** plus providers we contract with directly
> - **24/7 physician-led care navigation** that books visits and explains costs
> - **Usually 10–20% below comparable fully insured coverage,** fixed in your quote, with no admin fees
> Best for teams of about 15 or more that want one great group plan. [Get a Diamond quote](https://www.getprescience.com/get-started?p=Employer&product=diamond)

## Frequently asked questions

**Can insurers charge more for pre-existing conditions in small group plans?**

No. In the ACA small group market, premiums can vary only by age, tobacco use, location and family size, plus the plan you choose.

**Why do small group premiums go up every year?**

Rates may change with pooled costs, benefits and permitted member factors. Aging is not a universal 2–3% surcharge, and some ages share the same factor. Compare the actual census and rate filing.

**Do carriers look at our claims?**

Not for ACA small group pricing. Large group, level-funded and many PEO arrangements do consider claims or health information.

**How much more does a 60-year-old cost than a 25-year-old?**

On the federal default age curve, a 60-year-old's factor is 2.714 and a 25-year-old's is 1.004, so about 2.7 times as much for the same plan.

**Do children cost the same as adults?**

No. Under the federal curve, a child 0–14 has a factor of 0.765, and only the three oldest children under 21 are charged.

**What does the 80% medical loss ratio mean for my premium?**

In the small group market, carriers must spend at least 80% of premium on medical care and quality improvement, or pay rebates. It limits overhead and profit, not the growth of medical costs.

**Is a composite rate different from age rating?**

Composite billing averages rates into specified tiers under the applicable method. Federal and approved state methods differ; ask how changes in enrollment affect your invoice and renewal.

**Where can I see why my carrier raised rates?**

Small group rate filings are public. Look up the carrier at ratereview.healthcare.gov or on your state insurance department's site, and ask your carrier or broker to split your renewal into trend, aging and plan changes.

## Sources

- [HealthCare.gov, How insurance companies set health premiums](https://www.healthcare.gov/how-plans-set-your-premiums/)
- [CMS, State-specific age curve variations (federal default age curve)](https://www.cms.gov/files/document/statespecagecrv042517pdf)
- [CMS, Market rating reforms: state rating requirements](https://www.cms.gov/cciio/programs-and-initiatives/health-insurance-market-reforms/state-rating)
- [CMS, Medical Loss Ratio](https://www.cms.gov/marketplace/private-health-insurance/medical-loss-ratio)
- [PwC, Medical cost trend 2027 (including restated 2026 trend)](https://www.pwc.com/us/en/industries/health-industries/library/assets/pwc-behind-the-numbers-2027.pdf)
- [Mercer, Employers expect health benefit costs to jump in 2027 (September 2026)](https://www.mercer.com/en-us/about/newsroom/employers-expect-health-benefit-costs-to-jump-in-2027/)
- [Colorado DOI, 2026 small-employer change](https://content.govdelivery.com/accounts/CODORA/bulletins/3ebe767)
- [Colorado General Assembly, SB24-073](https://leg.colorado.gov/bills/sb24-073)
- [CMS, Market rating reforms](https://www.cms.gov/marketplace/private-health-insurance/market-rating-reforms)