Calculator Form
Example Data Table
| Input | Example Value |
|---|---|
| Employer coverage end date | 2026-04-30 |
| Qualifying event date | 2026-04-30 |
| Election date | 2026-05-20 |
| Total monthly plan cost | 850.00 |
| Admin fee percent | 2 |
| Monthly subsidy | 150.00 |
| Job start date | 2026-05-12 |
| Waiting rule | First of month after wait |
| Waiting period days | 30 |
| Expected medical claims per month | 200.00 |
| Emergency savings available | 1200.00 |
| HSA funds available | 500.00 |
Formula Used
1. Effective new coverage start
Effective Start = Override Start Date or Auto Start Date
2. Auto start date
Auto Start = Job Start Date + Waiting Period Days
If first-of-month rule applies, move to the next month start.
3. Gap days
Gap Days = New Coverage Start - (Employer Coverage End + 1 day)
4. Monthly COBRA estimate
Monthly COBRA = ((Plan Cost or Direct COBRA Premium) × (1 + Admin Fee %)) - Monthly Subsidy
5. Gap COBRA cost
Gap Cost = (Monthly COBRA ÷ 30.4375) × Gap Days
6. Claims estimate during gap
Claims During Gap = Expected Monthly Claims × Gap Months
7. Total buffer
Total Buffer = Emergency Savings + HSA Funds + Severance Reimbursement
8. Net transition pressure
Net Pressure = Gap Cost + Claims During Gap - Total Buffer
How to Use This Calculator
- Enter your employer coverage end date first.
- Add the qualifying event date and election date if known.
- Enter the monthly plan cost or a direct COBRA premium.
- Add any admin fee, subsidy, and severance reimbursement.
- Enter your job start date and waiting period details.
- Use a direct new coverage start date if you know it.
- Add expected monthly medical claims and available savings.
- Press Estimate Gap to see results above the form.
- Download the report as CSV or PDF if needed.
COBRA Coverage Gap Planning Guide
Why timing matters
COBRA coverage gap planning matters when employment changes quickly. Health insurance rarely ends when replacement coverage begins. That timing mismatch can create stress. A simple estimate helps you see premium pressure, cash needs, and likely exposure before bills appear.
Why short gaps still hurt
A short gap can still feel expensive. One urgent visit may upset a monthly budget. Continuation coverage can preserve your current network, deductibles, and familiar plan rules. Yet the monthly amount often rises sharply after payroll deductions stop. Estimating the gap early supports smarter employee benefits planning.
What this estimator reviews
This estimator reviews your employer coverage end date, expected replacement start date, waiting period, monthly plan cost, subsidy amount, and available savings. It also adds expected medical spending during the transition. That creates a clearer view of gap days, projected COBRA cost, available buffer, and possible funding pressure.
How the estimate supports decisions
Use the result to compare scenarios. You may have emergency savings, HSA funds, or severance reimbursements. A new employer may also begin benefits sooner than expected. When those pieces are measured together, you can judge whether the gap looks manageable or whether another coverage strategy deserves review.
Dates and details to confirm
Start with the exact date your current coverage ends. Then confirm the new plan start date or waiting period rule. Review the election timeline, payment timing, and any employer subsidy. Small date changes can materially alter the number of uncovered days and the amount you may need to reserve.
Use more than one scenario
Run the tool more than once. Try a shorter waiting period, a delayed start date, or a higher monthly claim estimate. Test best case and conservative cases. Scenario planning helps you see where risk grows. It also helps you decide how much emergency cash to hold during the transition.
Keep the estimate practical
This tool is designed for planning, not final plan administration. Real costs can change with family tiers, subsidies, reimbursements, and administrator notices. Still, a structured estimate is valuable. It reduces surprises and supports clearer health benefit decisions during layoffs, resignations, and onboarding periods with delayed benefits. It also gives households a calmer way to discuss benefit transitions.
FAQs
1. What does this calculator estimate?
It estimates possible coverage gap days, monthly COBRA cost, projected gap cost, expected claims during the gap, and how much savings may offset the transition.
2. Can I use a job start date instead of a new coverage date?
Yes. Enter the job start date, waiting period days, and waiting rule. The calculator will build an automatic replacement coverage date estimate.
3. What if I know the exact new coverage start date?
Use the new coverage start override field. That value takes priority over the automatic date built from job start and waiting period details.
4. Why is there a direct COBRA premium override field?
Some users already know the quoted continuation premium. The override lets you use that amount directly instead of calculating from the total monthly plan cost.
5. What does net transition pressure mean?
It shows how much estimated gap cost and expected claims exceed your listed buffer. A negative result means your buffer appears larger than the estimate.
6. Can this tool estimate overlap instead of a gap?
Yes. If the new plan starts before current coverage ends, the calculator shows estimated overlap days rather than a benefits gap.
7. Should I enter HSA funds and emergency savings together?
Yes, if both are part of your transition plan. The calculator adds them with severance reimbursement to estimate your total available buffer.
8. Is this result final plan advice?
No. It is a planning estimate. Final coverage timing, notices, premiums, and payment requirements should always be confirmed with your employer, administrator, or advisor.