Email Platform Cost Calculator
Email marketing platform cost.
Calculate email platform monthly cost from subscriber count, send volume, and any fixed-fee component on top of usage charges.
What this tool does
This calculator estimates your monthly email platform cost by combining three common pricing components. It takes your subscriber count and applies the per-thousand-subscriber rate, adds charges based on your monthly send volume at the per-thousand-sends rate, then includes any fixed monthly fee. The result shows your total projected monthly spend in local terms. Subscriber count and send volume typically drive the largest cost variations, while the fixed fee remains constant. This is useful for comparing platform pricing models or forecasting costs as your list and sending activity grow. The calculation assumes your platform uses this three-part pricing structure; many platforms may use different models, bundle features differently, or apply volume discounts not captured here. Results are estimates for planning purposes and don't account for discounts, overage fees, or feature add-ons.
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Formula Used
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Disclaimer
Results are estimates for educational purposes only. They do not constitute financial advice. Consult a qualified professional before making financial decisions.
Email platform costs break into subscriber-based pricing (Mailchimp, ConvertKit, Klaviyo) and send-volume pricing (SendGrid, Amazon SES, Mailgun). Subscriber-based: typically 10-50 per 1,000 subscribers per month. Send-volume: 0.50-3 per 1,000 sends. Transactional vs marketing: transactional usually cheaper per send.
20,000 subscribers × 12 per 1,000 = 240/month on subscriber pricing. Plus 100,000 sends × 1 per 1,000 = 100. Plus 30 fixed platform fee = 370/month, 4,440/year. Mid-market B2C ecommerce typical cost at this list size.
Consolidation opportunities: list hygiene (remove inactive subscribers saves on subscriber-based pricing). Segmentation (send less to everyone, more to engaged segments - lifts both revenue and deliverability, reduces cost). Platform switching: Klaviyo for ecommerce often pays for itself via revenue lift; ConvertKit good for creators; Brevo/SendGrid for high volume.
Quick example
With subscribers of 20,000 and cost per 1000 subscribers of 12 (plus monthly send volume of 100,000 and cost per 1000 sends of 1), the result is 370.00. Change any figure and watch the output shift — it's often more useful to see the pattern than to memorise the formula.
Which inputs matter most
You enter Subscribers, Cost per 1000 Subscribers, Monthly Send Volume, Cost per 1000 Sends, and Fixed Monthly Fee.
What's happening under the hood
Total = (subscribers/1000 × sub rate) + (sends/1000 × send rate) + fixed. The formula is listed in full below. If the number looks off, you can retrace the calculation by hand — that's the point of showing the working.
What to do with a low result
A disappointing result is information, not a judgement. Pick the single input that dragged the figure down most and focus the next quarter on that one factor. Breadth-first improvement rarely works; depth-first on the worst input usually does.
What this doesn't capture
The score is a composite of the inputs you provide. Life context — job security, family obligations, health, housing — doesn't appear in the math but shapes the real picture. Use the number as a prompt, not a verdict.
20,000 × ££12/1000 + 100,000 × ££1/1000 + ££30 = 370.00.
Inputs
This example uses typical values for illustration. Adjust the inputs above to match a specific situation and see how the result changes.
Sources & Methodology
Methodology
This calculator computes total monthly email platform costs by combining three separate charge components. First, it divides your subscriber count by 1,000 and multiplies by the per-1,000-subscriber rate to obtain subscriber-based charges. Second, it divides your monthly send volume by 1,000 and multiplies by the per-1,000-send rate to obtain volume-based charges. Finally, it adds any fixed monthly fee. The model treats all three charges as linear and applies them simultaneously each month. It assumes pricing rates remain constant and does not account for usage discounts, overages, setup fees, taxes, or annual payment adjustments that many platforms offer.
References
Frequently Asked Questions
Subscriber-based vs send-volume?
Best platform by use case?
List hygiene impact?
When to switch platforms?
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