The ROI question is simple to answer once you know two numbers: how many calls you're missing, and what each missed call is worth. Most agents who run this calculation are surprised by the result.
Key Takeaways
- The ROI of an AI phone agent is determined by three variables: call volume, miss rate, and average commission value.
- Even at a 10% lead-to-client conversion rate on recovered missed calls, most active agents see positive ROI within the first month.
- AI phone agent costs are fixed and predictable — making ROI calculations straightforward to model.
- The break-even point for most agents is 1–2 recovered missed calls per month.
- Agents in high-commission markets (average GCI over $10,000 per transaction) see ROI within the first week of recovered leads.
Step 1: Calculate Your Monthly Missed Call Volume
How many calls come in that you don't answer? If you don't know, enable call logging for 30 days and count every missed call. If you receive 60 calls per month and answer 35, your miss rate is 42% and your monthly missed call volume is 25.
Step 2: Estimate What Percentage of Missed Calls Are Real Leads
Not every missed call is a qualified lead. Some are vendors, existing clients calling for non-urgent reasons, or wrong numbers. A conservative estimate for active agents is that 20–40% of missed calls represent genuine new lead inquiries. Using 25 missed calls with a 30% lead rate, you're missing roughly 7–8 potential leads per month.
Step 3: Apply Your Conversion Rate
If your overall lead-to-client conversion rate is 5%, and you recover 8 missed leads per month, that's 0.4 additional closings per month — or roughly 5 additional closings per year.
Even at a conservative $8,000 average commission, that's $40,000 in additional annual GCI. Most AI phone agents cost $100–$200/month, or $1,200–$2,400 annually.
ROI: 1,600–3,200%.
Step 4: Add the Intangible Value
This calculation only accounts for recovered closings. It doesn't include the value of better lead intelligence (you now know who called and why), reduced personal interruption (you get focused work time back), and the compounding effect of a more organized pipeline.
The Minimum Viable ROI Scenario
Even with conservative assumptions — 20 missed calls per month, 20% lead rate, 3% conversion, $7,000 commission — recovering one additional closing every four months pays for a year of AI coverage. That's the minimum scenario. Most agents do significantly better.
FAQs
How do I know if my conversion rate assumptions are accurate? Use historical data from your CRM if available. If not, use 2–5% as a conservative baseline for internet leads and adjust as you gather data.
Does AI phone coverage increase lead volume or just capture existing leads better? It captures existing leads better — it doesn't generate new ones. The ROI comes entirely from recovering leads already coming to you.
How quickly will I see results after implementing an AI phone agent? Immediately. Every call the AI answers that would have gone to voicemail is a recovered lead. The results show up in your missed call count on day one.
Is there a free plan so I can test the ROI before committing? Yes. Terminus offers a free plan so you can see your actual call coverage and lead capture rate before making a decision.
Run your own ROI calculation and then get started with Terminus for free to see what recovering your missed calls actually looks like in practice.
Sources
- ROI model based on Terminus internal analysis and industry-standard lead conversion estimates
- NAR 2024 Member Profile (average GCI benchmarks)