- Buying Medicare Advantage leads across AEP and OEP volume swings is not a calendar problem. It is two different lead economies sharing one CMS product, and a flat 12-month bid sheet quietly hands your Q4 margin back to vendors in January.
- OEP is a switcher-only window. Only existing Medicare Advantage enrollees can use it to change plans (per CMS guidance on Medicare enrollment), so a $22 shared lead that worked in AEP needs to clear at roughly $13 to $14 in OEP for the unit economics to hold.
- The repackaging tell is the ratio between contact rate and current-plan-disclosure rate, not either KPI alone. Clean OEP files run above 1.4 in the first two weeks of January. Contaminated files fall below 1.0.
- Move your billable call duration threshold from 90 seconds in AEP to 120 to 180 seconds in OEP. Short January calls are mostly misrouted non-OEP-eligible callers the vendor is hoping you pay for.
- The chargeback clause that survives vendor pushback is ratio-based on rolling 100-lead weekly samples, not disposition-based on individual leads.
Questions this article answers:
- Why does a shared lead that worked in AEP break in OEP at the same price?
- How do I tell if a vendor is repackaging Q4 AEP overflow as January OEP supply?
- What call duration threshold should I pay against in OEP versus AEP?
- What chargeback clause actually survives vendor pushback?
- How do I forecast OEP volume off AEP performance without overcommitting capacity?
- Which vendor types hold their economics best across the AEP-to-OEP transition?
Why AEP and OEP Are Two Lead Economies, Not Two Halves of One Calendar
Medicare Advantage buyers who run a single bid sheet across AEP and OEP quietly subsidize their vendors through January with the margin they earned in October. That is the whole story of buying Medicare Advantage leads across AEP and OEP, and the rest of this article is the bid sheet, the duration grid, the contamination test, and the chargeback clause that fix it.
The core asymmetry is simple. AEP (the Annual Enrollment Period, Oct 15 to Dec 7) lets any Medicare-eligible person enroll in or change a plan. The TV spend, direct mail, and broker activity that flood Q4 pre-warm the entire universe. OEP (the Open Enrollment Period, Jan 1 to Mar 31) only lets existing Medicare Advantage enrollees switch once. Per CMS guidance on the Medicare Advantage Open Enrollment Period, Original Medicare beneficiaries cannot use OEP at all.
The lead market does not reprice itself for that change. Vendors keep quoting the same shared-lead CPL (cost per lead, what you pay per submitted form or call) they quoted in November. The buyer who does not push back is the one absorbing the gap.
We will walk this in four windows: pre-AEP ramp, AEP peak, AEP wind-down, and OEP. Each one has its own bid ceiling, vendor mix, billable threshold, and contractual trigger.
Why Does a Shared Lead That Worked in AEP Break in OEP at the Same Price?
A shared Medicare Advantage lead in AEP becomes a materially more expensive lead in OEP because eligibility filtering, lower contact rate, and longer qualification calls compound against the same headline CPL. The price tag does not change. The economics underneath it collapse.
The addressable-pool math: most of the Medicare universe can’t legally use OEP
Medicare Advantage enrollment reached roughly 34 million people in 2025, or about 54% of eligible beneficiaries with both Parts A and B, per KFF’s Medicare Advantage enrollment tracker. Only those existing MA enrollees can use OEP to switch plans. Original Medicare beneficiaries, dual-eligibles outside MA, and people aging in mid-quarter are not legally OEP-actionable for a plan change.
Narrow that further. Most MA enrollees who just bought in AEP are not shopping again in January. The realistically actionable OEP pool is a fraction of the Medicare universe, not the full 54%. That is the gap vendors are pricing against when they quote January at AEP rates.
The other half of the universe cannot use OEP at all. They show up as contacts. They do not show up as enrollments.
Net-effective CPL: the formula that translates AEP pricing to OEP reality
The formula that prices this honestly:
Net-effective CPL = Gross CPL ÷ (contact rate × eligibility rate × AOR conversion rate)
In AEP, eligibility runs near-universal because anyone Medicare-eligible can act. In OEP, eligibility collapses to the share of the file that is actually MA-enrolled and shopping. Even if contact rate and AOR (Agent of Record) conversion held flat, a drop in eligibility from roughly 90% to roughly 30% would triple your net-effective CPL on the same headline price.
Contact rate also drifts down 4 to 7 points in OEP because the actionable pool is smaller and a chunk of it just enrolled and isn’t picking up. Both effects stack.
For the unit economics to hold, your OEP shared-lead CPL ceiling needs to fall 35 to 45% from AEP peak. If you keep paying the AEP rate, the vendor pockets the difference.
The Four-Window Bid Sheet: Pre-AEP Ramp, AEP Peak, AEP Wind-Down, and OEP
The four-window framework replaces the single 12-month bid sheet with four separate ones, each tuned to the dominant intent signal of that window.
| Window | Dates | Dominant intent | Shared CPL posture | Vendor mix | Governing KPI |
|---|---|---|---|---|---|
| Pre-AEP ramp | Sep 1 to Oct 14 | Research and aged-data | Lowest of the year | Aged data, inbound test buys | Contact rate |
| AEP peak | Oct 15 to Dec 7 | Volume and velocity | Annual ceiling | Shared form, exclusive form, inbound | AOR conversion on contacts |
| AEP wind-down | Dec 8 to Dec 31 | Lock-in and renegotiation | 20 to 30% off peak | Pull shared, hold inbound | Lead-to-app rate |
| OEP | Jan 1 to Mar 31 | Switcher-only | 35 to 45% off peak, eligibility-gated | Exclusive form, inbound, kill open shared | Repackaging Ratio |
Use your actual AEP shared CPL as the anchor and step down from there. The relative cuts matter more than absolute dollars, because shared CPL varies by geo, vendor, and lead type.
Pre-AEP ramp (Sep 1 to Oct 14): aged leads and inbound calibration
Keep ceilings low. Aged data and small inbound test buys are the right tools here. Use this window to calibrate your call-tracking stack. CallRail’s conversation intelligence and Ringba’s target group routing are both standard buyer-side setups for this. Do not commit fixed shared-lead minimums until Oct 10 at the earliest. Vendors who pressure you for September commits are pricing against your panic, not their supply.
AEP peak (Oct 15 to Dec 7): the volume-and-velocity window
This is the only window where premium shared CPL works. TV, direct mail, and broker air cover pre-warm the universe. Contact rates climb. Eligibility runs near-universal. Lean into volume. Run shared, exclusive form, and inbound concurrently. The KPI to police is AOR conversion on contacts, not CPL. If AOR holds at your target, raise your ceiling and buy more. If it doesn’t, cut before you scale.
AEP wind-down (Dec 8 to Dec 31): renegotiate January before vendors set it for you
The second AEP ends, every vendor in your stack has Q4 supply they need to clear. This is when they start floating January pricing at AEP rates. Pull your shared ceilings down 20 to 30% from peak. Hold inbound at full price because intent stays high through year-end Special Enrollment Period activity. Send the OEP rate sheet by Dec 15. If a vendor will not commit to a 35%+ price cut for January shared volume, route around them and use the saved budget for exclusive and inbound in Q1.
OEP (Jan 1 to Mar 31): exclusive, inbound, eligibility-gated only
Kill open shared in OEP unless the vendor accepts eligibility-gated pricing. That means you only pay full price for leads where current MA enrollment is verified on the form or call. Exclusive form leads with current-plan disclosure and inbound transfers with the right billable threshold (next section) are the only economics that hold. Aged data is fine for agent training but should not carry forecast weight.
What Call Duration Threshold Should I Pay Against in OEP Versus AEP?
The billable call duration threshold should move from 90 seconds in AEP to 120 to 180 seconds in OEP because plan-comparison conversations with switcher-only intent run longer, and short January calls disproportionately represent miscategorized non-OEP-eligible callers.
In AEP, a 90-second threshold filters most junk. Pre-warmed callers either engage quickly or hang up. The 90-second mark catches the real conversations.
In OEP, the math changes. A real OEP qualifying call has to cover current plan confirmation, drug list reconciliation, network check on a few doctors, and a plan-side comparison. That conversation does not finish in 90 seconds. Calls that drop at 90 to 110 seconds in January are usually one of three things:
- An aging-in caller who cannot use OEP and disqualifies once the agent asks about current MA enrollment.
- A dual-eligible who is on a different path and was misrouted.
- An SEP caller whose situation does not actually qualify.
Moving the billable threshold to 120 seconds (for tighter geos) or 180 seconds (for plan-rich markets) lets the contamination self-reject on the billable line. The vendor cannot bill for the 95-second hang-up because the contract says so. The same dynamic shows up in our pay-per-call insurance buyer pricing tiers work. Duration is the cheapest enforcement mechanism a buyer has.
For partial-pay on calls that drop in the 90 to 120 second band, the cleanest structure is a 50% rate with a hard cap at 15% of monthly volume on partial-billable calls. Above 15%, the file is contaminated and you renegotiate the base CPL.
How Do I Tell If a Vendor Is Repackaging Q4 AEP Overflow as January OEP Supply?
The repackaging tell is the ratio between contact rate and current-plan-disclosure rate, not either KPI alone. Policing either one in isolation gets gamed. The ratio is the lock.
What contamination actually looks like: SEP, aging-in, and dual-eligible blended into ‘OEP supply’
When a vendor has Q4 leads they could not move, the temptation in January is to relabel them. They blend in SEP leads (Special Enrollment Period, qualifying life events), aging-in leads (people turning 65 mid-quarter), and dual-eligibles (Medicare and Medicaid). All three groups are real Medicare-age callers with real phones. Contact rate looks normal.
But none of them can use OEP to change a Medicare Advantage plan. So when your agent asks the qualifying question, “Are you currently enrolled in a Medicare Advantage plan?”, disclosure rates crater. The file is not actually OEP-actionable.
A clean OEP file shows the opposite pattern. Contact rate falls 4 to 7 points from the late-December baseline because you are calling a smaller, more specific switcher pool, and many of them just bought in AEP and are not picking up. Current-plan-disclosure climbs above 80% in the first two weeks of January because the file is real MA enrollees.
The Repackaging Ratio: why current-plan-disclosure ÷ contact rate is the lock
Here is why the ratio works when single KPIs don’t. If you police contact rate alone, vendors blend in aging-in and dual-eligible leads to keep contacts up. If you police current-plan-disclosure alone, vendors throttle delivery on contaminated segments and ship cleaner sub-files to inflate the disclosure rate while billing you for the full mix. The ratio catches both.
Measure it on rolling 100-lead samples weekly through January. By the third week, the ratio stabilizes. If it is sitting at 1.1 or below on a file you are paying OEP rates for, you have a repackaging problem. The next section is the contract clause that does something about it.
What Chargeback Clause Actually Survives Vendor Pushback?
The chargeback clause that survives vendor pushback is a ratio-based trigger, not a disposition-based trigger. Disposition rejection language gets renegotiated to death because vendors can dispute every individual disposition. A two-KPI ratio measured on a rolling sample is a math fact.
Why disposition-based chargebacks fail and ratio-based chargebacks hold
When the contract says “we can chargeback any lead dispositioned as wrong-party, do-not-call, or non-OEP-eligible,” you spend the quarter arguing about whether the disposition code was applied correctly. Vendors push back on individual leads. Your team burns hours per week defending dispositions. The chargeback rate ends up at 4 to 6% because the friction is too high to enforce.
A ratio-based clause looks like this:
On any rolling weekly sample of 100 or more delivered leads in January or February, if current-plan-disclosure rate divided by contact rate falls below 1.1, buyer may apply a CPA chargeback equal to 40% of the week’s billed volume. Buyer reserves the right to audit disposition records and call recordings on demand.
That language is enforceable because the math is the math. The vendor cannot argue about individual leads. They either deliver a file with the ratio or they take the chargeback.
The three audit rights every Medicare lead contract should carry into 2026
What we push for when we help buyers rewrite agreements:
- Lead-mix disclosure. The vendor reports the percentage of supply by source category (paid social, aged data, SEP-driven inbound, organic search) on a weekly summary. Mix shifts above 15% in any category trigger a notice.
- Recorded-call audit access. Per the CMS final rule on Third-Party Marketing Organizations, recorded-call retention requirements have tightened. The recordings exist. Your contract should give you read access for a meaningful sample.
- Post-buy reconciliation window. A 30-day window after delivery to true up the ratio test, dispute lead-mix shifts, and apply chargebacks. Without this, vendors close the books before you finish your analysis.
We cover similar contract structure in the cost-per-enrollment chargeback work for Medicare Advantage. The principle is the same across both pieces. Make the trigger mechanical, not subjective.
How Do I Forecast OEP Volume Off AEP Performance Without Overcommitting Capacity?
Forecast OEP volume as 25 to 40% of AEP daily lead volume at a 2.5 to 4x net-effective CPL, not as a linear extrapolation. Buyers who project AEP daily averages into January overcommit on agent seats, dialer minutes, and vendor minimums every year.
The right starting point is the OEP-eligible subset in your geo footprint, meaning existing Medicare Advantage enrollees in the counties you write, not your AEP volume. Pull current MA penetration by county from CMS Medicare Advantage enrollment data and weight by your historical close rate by market.
Week 1 of January is distorted by holiday lag. Carriers are slow to issue. Callers are catching up on mail. Do not extrapolate Jan 1 to 7 into your full-quarter forecast. Wait until week 3 to lock in the run rate.
On capacity, commit 60% of forecasted OEP capacity to fixed vendor minimums and hold 40% in spot inbound and exclusive form pickups that flex against actual Repackaging Ratio readings in mid-January. If the ratio comes in clean on a vendor, scale them up. If it comes in dirty, redirect the held 40% to a cleaner source without breaking a minimum.
Which Vendor Types Hold Their Economics Best Across the AEP-to-OEP Transition?
The vendor categories that hold across the transition are exclusive form leads with current-plan disclosure on the form, and inbound transfers with a 120-second-plus billable threshold. Open shared form leads do not hold unless the vendor agrees to eligibility-gated pricing. Aged data does not hold for forecast volume. It is training material only.
| Vendor type | AEP economics | OEP economics | Notes |
|---|---|---|---|
| Open shared form | Strong at peak pricing | Breaks unless price drops 35 to 45% | Most common repackaging source |
| Exclusive form (eligibility-gated) | Strong | Strong | Push for current-plan disclosure on form |
| Inbound transfer | Strong | Strong with 120s+ threshold | Lengthen duration threshold in January |
| Aged data | Useful for warming | Training only | Do not load forecast |
| Co-reg / SEP-blended | Avoid in AEP | Avoid in OEP | Repackaging risk |
If you want a deeper breakdown of how exclusive-versus-shared math works under different intent conditions, our ACA close-rate benchmark piece covers the same logic for a similar switcher-window product. The Medicare Supplement telesales floor economics piece walks through how persistency-adjusted CPA reframes lead-type selection.
Frequently Asked Questions
Why does my Medicare Advantage CPL look fine in AEP but my close rate collapses in January?
Your CPL looks fine because the headline price did not change. Your close rate collapses because CMS rules restrict OEP to existing Medicare Advantage enrollees only, which shrinks the actionable pool dramatically. The same shared lead that converted in AEP now contains a much smaller share of people who can legally switch plans. Net-effective CPL roughly triples even when gross CPL holds flat.
How do I detect AEP overflow being repackaged as January OEP supply?
Track the Repackaging Ratio: current-plan-disclosure rate divided by contact rate, measured on rolling 100-lead weekly samples in January. A clean OEP file trends above 1.4 in the first two weeks. A contaminated file (SEP, aging-in, or dual-eligible blended into the mix) trends below 1.0 because contacts hold up while disclosure craters. Policing either KPI alone gets gamed. The ratio does not.
What call duration threshold should I pay against in OEP?
Move from 90 seconds in AEP to 120 to 180 seconds in OEP. Plan-comparison conversations with switcher-only intent take longer because they involve current plan confirmation, drug list reconciliation, and network checks. Calls that drop at 90 to 110 seconds in January are disproportionately misclassified non-OEP-eligible callers, so a higher threshold lets the contamination self-reject on the billable line.
How much should my shared-lead CPL fall from AEP to OEP?
Shared-lead CPL ceilings should fall 35 to 45% from AEP peak to OEP for unit economics to hold. This range covers the addressable-pool collapse and the lower contact rate from a thinner switcher pool. Flat pricing across the boundary is the largest single source of margin transfer from buyer to vendor in Medicare Advantage lead buying.
What chargeback clause survives vendor pushback?
A ratio-based trigger measured on rolling weekly samples, not a disposition-based rejection clause. Disposition rejection language gets argued lead-by-lead and ends up enforced at 4 to 6%. A clause that triggers a 40% CPA chargeback when the Repackaging Ratio falls below 1.1 on a 100-lead sample is a math fact the vendor cannot dispute individually.
How do I forecast OEP volume off my AEP performance?
Forecast 25 to 40% of AEP daily lead volume at a 2.5 to 4x net-effective CPL, weighted by county-level MA enrollment density. Do not extrapolate AEP daily averages linearly into January. Commit 60% of capacity to fixed vendor minimums and hold 40% in spot inbound that flexes against actual ratio readings by mid-January. Week 1 is distorted by holiday lag. Wait until week 3 to lock in the run rate.
We are media buyers and lead-gen operators sharing what we see in the field. This is not legal advice. Medicare marketing, CMS TPMO requirements, and lead-buyer compliance are genuinely complicated and vary by state and carrier. Talk to an actual attorney and your carrier compliance team before changing vendor contracts, consent flows, or call-recording practices.
If you are spending serious money on Medicare Advantage lead acquisition and you want a second set of eyes on your 2026 bid sheet, your vendor contracts, or your OEP contamination audit, talk to our pay-per-call and lead-buying team. We will walk your geo footprint, your current vendor mix, and your Repackaging Ratio readings together and tell you exactly where the margin is leaking. Book a free strategy call with Elevarus and ask about exclusive lead routing and eligibility-gated pricing for Medicare Advantage.
