What an Inactive Subscriber Costs You: Klaviyo vs beehiiv vs Mailchimp vs HubSpot Pricing Math (2026)

Updated 1 November 2026. Prices carry the date they were checked; re-checked quarterly.

Who bills what: the rules

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Sources for each row are the platforms' own help centers, listed at the end; the four platform guides on this site walk through the clicks.

The prices behind the math (as of the dates shown)

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Tier pricing is stepped, not linear: removing contacts saves money only when it crosses a tier boundary (Klaviyo, beehiiv, Mailchimp) or a block boundary (HubSpot). That is why the examples below are computed at boundaries.

Worked example: 50,000 contacts, 20,000 inactive

Assume a list of 50,000 contacts of which 20,000 have no click, reply or purchase in your inactivity window. What does keeping the 20,000 cost for a year, and what does removing them save?

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The order of magnitude is the point. On HubSpot the cost of inactive marketing contacts is a budget line; on Klaviyo and Mailchimp it is a tier step; on beehiiv it is often zero until you cross a bucket. Confirm your own tier on the pricing page or the plan builder before acting; prices change and the examples use the dates above.

The number that matters more: what the inactive segment is worth

Klaviyo's 2026 benchmarks: flows are 5.3% of sends and about 41% of email revenue, with revenue per recipient nearly 18 times that of campaigns. An engaged subscriber is worth multiples of the average; an inactive one worth nothing until they engage again. The two numbers to compare are:

• Cost to keep = inactive contacts × effective price per contact per month × months. At HubSpot's ~$0.05, 20,000 inactive contacts cost about $12,000 a year. At Klaviyo's ~$0.014, about $3,400 a year before suppression; $0 after.
• Revenue asleep = inactive contacts × recoverable share × revenue per active subscriber per month × months. At a 15% recoverable share and $2 per active subscriber per month (the calculator's planning defaults), 20,000 inactive contacts hold about $72,000 a year; at 5%, $24,000.

On every platform the revenue estimate dwarfs the cost estimate, which is why the right sequence is: revive the part of the inactive segment that ever engaged (past clicks or purchases), measure it on a frozen cohort, and only then suppress, archive or set non-marketing the rest. Removing first forfeits the upside to save the smaller number.

Run both numbers for your list. The dormant email list value calculator takes list size, dormant share, revenue per active subscriber and your per-contact cost, and shows revenue asleep, cost to keep and the net. Open the calculator →

What to do on each platform (short version)

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On every platform, run the reactivation stream for contacts with past engagement before the removal step. The playbook has the eligibility tiers, the 1/30 schedule and the stop conditions.

FAQ

Which email platforms charge for inactive subscribers? Mailchimp (subscribed, unsubscribed and non-subscribed contacts until archived) and HubSpot (every marketing contact until set non-marketing). Klaviyo stops charging once a profile is suppressed or unsubscribed; beehiiv counts only active subscribers.

Does Mailchimp charge for unsubscribed contacts? Yes, for accounts created after 15 May 2019, until you archive them. Archiving keeps their data and their unsubscribed status.

Does HubSpot charge for unsubscribed or bounced contacts? Yes, while their marketing contact status is "marketing." Set them to non-marketing; the change applies on the next update date.

Does suppressing profiles in Klaviyo lower my bill immediately? Your plan must cover your active profiles; suppressed profiles are not counted, so the next billing cycle reflects the lower count. Tiers are stepped, so the saving appears when you cross a tier.

Is it cheaper to delete inactive subscribers? No cheaper than suppressing, archiving or marking inactive, and it destroys the suppression record, so the address can be re-imported by mistake. Keep the record; stop the billing with the platform's own mechanism.

Should I remove inactive subscribers to save money? Remove the ones with no engagement ever after one re-permission email. Revive the ones with past clicks or purchases first; their value usually exceeds the cost of keeping them for the 30–45 days a reactivation stream takes.

Start with the scan. The free List Health Audit maps dormancy by tier for any ESP and estimates recoverable revenue within 72 hours. Get the free audit →

Sources

• Klaviyo Help, Understanding active profile management and Understanding suppressed email profiles; Klaviyo, How Klaviyo pricing works; plan-builder quotes as published on this site's Klaviyo guide (17 Oct 2026). https://help.klaviyo.com/hc/en-us/articles/24263920096027
• Klaviyo, Email Benchmarks 2026: flows 41% of revenue from 5.3% of sends; RPR ~18× campaigns. https://klaviyo.com/products/email-marketing/benchmarks
• beehiiv Support, Plan types and subscriber plan tier pricing; beehiiv pricing page (18 Oct 2026). https://www.beehiiv.com/support/article/23874462928663 and https://www.beehiiv.com/pricing
• Mailchimp Help, About Your Contacts, Archive or Unarchive Your Contacts, Archive Inactive Contacts, Import Suppression Lists (unsubscribed contacts billed for accounts created after 15 May 2019); Standard tier prices from third-party trackers (1 Nov 2026). https://mailchimp.com/help/about-your-contacts/
• HubSpot Knowledge Base, Understand marketing contacts billing, Set contacts as non-marketing; HubSpot Marketing Hub pricing page (1 Nov 2026); block prices from third-party trackers (1 Nov 2026). https://knowledge.hubspot.com/account/understand-marketing-contacts-billing
• Substack Support, How do I use the subscriber dashboard on Substack?: manual removal, pro-rated refunds. https://support.substack.com/hc/en-us/articles/360058529871
• EngageMKTG, Dormant Email List Value Calculator (planning defaults: 15% recoverable share, $2 per active subscriber per month).