What counts as after-hours missed call revenue?

After-hours missed call revenue is the money that walks out the door when someone calls your business outside staffed hours and reaches voicemail or a dead line. Most local service businesses take 20 to 35 percent of their inbound calls after hours, on weekends, or during lunch and shift changes. A large share of those callers never call back. They dial the next result on the page. This calculator turns that leak into a number by combining your call volume, your after-hours share, and your average customer value, so you can see the monthly and annual figure instead of guessing at it.

How is the recovered revenue number calculated?

The math is deliberately simple and conservative so you can defend it. First, after-hours calls equal your monthly inbound calls times your after-hours percentage. Then the AI answer-and-engage rate estimates how many of those calls a 24/7 voice agent actually holds through a real conversation, not just a pickup. Then your booking or close rate converts engaged callers into customers. Finally, new customers times your average customer value gives monthly recovered revenue, and that times twelve gives the annual figure. Every input is yours to adjust. Lower the answer rate and close rate if you want a worst-case view before booking a demo.

What answer rate should I use for an AI voice agent?

A well-built voice agent answers effectively 100 percent of calls, since it never sleeps or goes to lunch. The answer-and-engage rate here is more conservative on purpose. It accounts for callers who hang up on any automated greeting, wrong numbers, and spam. Seventy percent is a reasonable default for a tuned agent with a natural greeting and fast response time. If your current voicemail catches almost nobody after hours, even a fifty percent engage rate is a large gain over zero. Start conservative, look at the recovered number, then book a walkthrough to see live call transcripts from agencies running Hermes.

Is this the same as a missed-call ROI calculator?

It is a focused version of one. A general missed-call calculator counts every unanswered call across the whole day. This tool isolates the after-hours window because that is where the cleanest, most defensible wins live. During business hours you have staff who eventually call people back. After hours, nights, weekends, and holidays, a missed call is usually gone for good. That is exactly the gap a 24/7 AI voice agent closes. If you want the full-day view, or per-client agency margins, use the Voice AI Margin Calculator and ROI tools linked below to model the complete picture.

How does Hermes fit an agency selling this to local businesses?

Hermes is the platform agencies use to deploy 24/7 voice agents for their local business clients under the agency's own brand. You build the agent, connect the phone number, wire the CRM, and bill the client, all in one place, without stitching together Retell, GoHighLevel, Zapier, Stripe, and Twilio. Plans start at $149 per month for Starter with 3 workspaces, $399 for Business with 7, and $699 for Agency with 20. The recovered-revenue number this tool produces is the exact story you tell a prospect. Book a walkthrough and we will show you how to package and price it.

Do I need to enter my real numbers to get value?

No. The defaults model a typical local service business, so the tool is useful before you gather a single data point. That said, the closer your inputs, the more convincing the output when you share it. Pull your monthly call count from your phone provider or CRM, estimate your after-hours share from your voicemail logs, and use your true average customer value rather than a single transaction. Then copy the shareable link, which encodes every input in the URL, and send it to a partner or a client. They open it and see the same numbers, which makes the after-hours revenue leak impossible to ignore.

free tool

After-hours revenue recovery calculator.

Every call that hits voicemail after hours is revenue walking to your competitor. Put in your numbers and see what a 24/7 AI voice agent recovers each month, in dollars.

/ business type/ inbound calls per month/ % of calls after hours/ avg customer value ($)/ AI answer + engage rate (%)/ booking / close rate (%)

/ monthly revenue recovered

$20,825

$249,900 recovered per year with a 24/7 AI voice agent.

after-hours calls

100/mo

new customers

24.5/mo

/ return vs a $399 Hermes plan

52.2x

Recovered revenue divided by the Hermes Business plan ($399/mo). Starter runs $149/mo, Agency $699/mo.

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Your inputs are encoded in the URL. Send it to a partner and they see the same numbers.

how it works

Why after-hours is the cleanest win.

Most local service businesses obsess over ad spend and lead cost while a quieter leak runs every single night. Between a quarter and a third of inbound calls land outside staffed hours: after 6pm, on weekends, during lunch, or in the gap between shifts. During business hours a missed call is recoverable because someone eventually calls back. After hours it usually is not. The caller has a burst pipe, a toothache, or a buying decision they want handled now, and they move straight to the next business that picks up.

This calculator isolates that window so the number is defensible. It multiplies your monthly call volume by your after-hours share to find the calls at risk. It applies a conservative answer-and-engage rate, because a real agent conversation matters more than a raw pickup. Then it applies your booking or close rate and your average customer value to turn engaged callers into recovered dollars, monthly and annual. Every input is yours to move, so you can model a cautious floor before you ever talk to us.

A 24/7 AI voice agent closes the gap directly. It answers on the first ring at 2am, asks the right qualifying questions, books the appointment, and drops a summary into your CRM before your team is even awake. For an agency, this is the exact story you sell to a local business: here is the revenue you are losing tonight, and here is the agent that captures it. Hermes is the platform that lets you deploy, brand, and bill that agent from one place, on plans from $149 to $699 per month.

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After-hours revenue recovery calculator.

Why after-hours is the cleanest win.

Common questions.

Capture the calls you are missing tonight.

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