Why would my voice vendor raise prices on me?

Because most of the platforms agencies build on do not own their own economics. A wrapper sits on top of an API provider, that provider sits on top of an LLM and a telephony carrier, and every one of those layers reprices independently. When an upstream cost moves, the wrapper either eats it or passes it down, and passing it down is cheaper. Agencies have watched per-minute rates move by several multiples with a few weeks of notice. The second reason is strategic: platforms that raise venture money often move upmarket toward enterprise contracts, and repricing the small-agency tier is a quiet way to push that segment out without announcing it.

How does this calculator work?

It takes five inputs: your client count, average voice minutes per client per month, what you charge each client, what your vendor charges you per minute today, and your fixed monthly tool spend outside of voice. From those it computes total minutes, total revenue, and your current cost base. It then reprices only the per-minute component at a 25, 50, 100 and 300 percent increase, holding your client pricing constant, because in practice you cannot reprice clients mid-contract on a vendor's timeline. The break-even figure is the exact percentage increase at which your monthly profit reaches zero, and the matching per-minute rate at that point. Nothing is stored, nothing is sent anywhere, and the inputs are encoded in the URL so you can share the exact scenario with a partner or a client.

Why hold my client pricing constant in the model?

Because that is what actually happens. Your agreements with end clients are usually annual or at least quarterly, they were priced on a proposal your buyer already approved, and raising them requires a conversation, a justification, and sometimes a renegotiation. A vendor can change its rate card with 30 days of notice. That timing mismatch is the entire risk. If you want to see what a price increase to your own clients would do, run the numbers again with a higher client price and compare the two results side by side. The gap between them is what you would need to recover, and how fast. Most operators find the recovery window is longer than the notice period their vendor is obliged to give them.

What counts as fixed monthly tool spend?

Everything that is not billed per voice minute. For a typical agency that means the CRM seat, the automation platform, the billing and subscription tool, telephony numbers and carrier fees, any A2P registration costs amortized across the year, plus whatever you pay for a client-facing dashboard or portal. If you use contract development to hold that stack together, include the monthly retainer here too. Fixed spend matters in this model because it does not scale with a per-minute hike, so the larger it is relative to your minute cost, the less sensitive your margin looks to a rate increase and the more sensitive it is to client churn.

How is Hermes different on this specific risk?

Hermes publishes its overage rate at 0.24 per minute on a public pricing page, with included minutes on every plan: 300 on Starter at 149, 1,000 on Business at 399, and 2,000 on Agency at 699 per month. The platform runs its own infrastructure rather than reselling another vendor's API, which is what makes a stable published rate possible in the first place. That does not mean prices can never change anywhere in this market. It means the rate you are quoted is a public commitment rather than a line item in a private rate card that can be revised by email, and that CRM, campaigns, white-label and billing are already inside the number instead of arriving as four more invoices.

What should I do if my exposure number looks bad?

Three moves, in order. First, find out contractually how much notice your vendor owes you before a rate change, because that number tells you how long you have to react. Second, price your next few client agreements with a margin buffer wide enough to absorb your break-even hike, rather than at the thinnest number the deal will accept. Third, reduce the number of layers between you and the actual cost, since each layer adds both a markup and a repricing risk. Consolidating a five to seven tool stack onto one platform removes most of the surface area where an unexpected invoice can appear, and it makes the margin on every client legible instead of spread across half a dozen statements.

free tool

Voice vendor price hike exposure calculator.

Your vendor sets the per-minute rate. Your clients set your revenue. Find out how large a rate increase your agency can absorb before the margin is gone, and what a 50 percent hike costs you next month.

your book of business

Active clientsVoice minutes per client per monthWhat you charge each client per monthWhat your voice vendor charges you per minute todayFixed monthly tool spend (CRM, automation, billing, telephony)

break-even hike

+968%

A per-minute increase past this point wipes out your profit entirely. That is a rate of 1.922 per minute.

You have room, but not unlimited room.

Your margin survives a doubling, but every hike still comes straight out of your profit, not the vendor's.

if they raise 50%

$486

gone from monthly profit. Margin falls to 83% on $10,800 of revenue across 5,400 minutes.

Rate change	Per minute	Monthly cost	Monthly profit	Margin
Today	0.180	$1,392	$9,408	87%
+25%	0.225	$1,635	$9,165	85%
+50%	0.270	$1,878	$8,922	83%
+100%	0.360	$2,364	$8,436	78%
+300%	0.720	$4,308	$6,492	60%

the same book on Hermes

Business plan at $1,455 per month all in, published overage of 0.24 per minute, no separate CRM, automation, or billing bill. That leaves $9,345 in monthly profit, a 87% margin, and the rate is on a public pricing page rather than a vendor email.

Book a 20-min walkthrough to cut this number

Want the full breakdown for your agency? Book 20 minutes and we will run your real numbers line by line.

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

how it works

Your margin is only as stable as someone else's rate card.

Most AI voice agencies price a client once and then pay for the delivery of that client every single month at a rate they do not control. The client agreement is fixed for a year. The vendor rate card is not. That asymmetry is invisible while rates are flat and brutal the week they move, because the entire increase lands on the one line of the P&L that has nowhere to go: your profit.

The calculation is simple enough to do on paper, which is exactly why most operators never do it. Total minutes times the per-minute rate gives your variable cost. Add fixed tool spend for the CRM, the automation layer, billing, and telephony. Subtract from revenue. The number that matters is not today's margin, it is the percentage increase that takes that margin to zero. If your break-even hike is under 100 percent, a vendor doubling its rate ends your profitability, and doubling is not a hypothetical in this market. Wrapper platforms built on other people's APIs have repriced by multiples with weeks of notice, and every agency downstream absorbed it.

There are two structural fixes. The first is margin buffer: price new clients so the gap between what you charge and what delivery costs is wide enough to survive your break-even number, rather than at whatever the deal would tolerate. The second is layer count. Every intermediary between you and the actual infrastructure adds a markup and an independent repricing decision. A stack of five to seven tools is five to seven separate opportunities for an invoice to change without your input.

Hermes exists on the other side of that trade. Included minutes on every plan, a published overage rate of 0.24 per minute, and CRM, campaigns, white-label, and billing in the same platform rather than in four more subscriptions. Starter runs 149 per month with 300 included minutes, Business 399 with 1,000, Agency 699 with 2,000. Run your numbers above, then compare them to the Hermes line at the bottom of the tool.

frequently asked

Common questions.

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Voice vendor price hike exposure calculator.

Your margin is only as stable as someone else's rate card.

Common questions.

Run your agency on Hermes.

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