If you're sending somewhere in the neighborhood of 45,000 to 60,000 SMS segments a month, there's a line you keep crossing and re-crossing without thinking about it — and it moves your per-segment rate by 20%.
Full disclosure: I work for Ready, so I'm describing our own pricing here. But the point of this post isn't to sell you a tier. It's to show you the actual arithmetic of a threshold that's easy to leave money on, and how a sender parked right around 50,000 segments should think about when they hit send.
The threshold, plainly
Ready has two self-serve per-segment rates, and which one you pay is decided by your calendar-month segment volume — not a plan you pick, not a contract you sign.
| Tier | Segments / month | Per segment | + carrier ($0.0045) | All-in |
|---|---|---|---|---|
| Standard | 0–50,000 | $0.02 | $0.0045 | $0.0245 |
| Growth | 50,000+ (automatic) | $0.016 | $0.0045 | $0.0205 |
The Growth rate applies automatically once your account passes 50,000 segments in a calendar month. Nobody at Ready flips a switch, and you don't request it. You cross the line, the rate on the segments past the line drops. (There's an Enterprise tier above this for high volume — that's custom negotiated, so if you're consistently sending well past six figures a month, talk to us rather than guessing at a number.)
The carrier pass-through — $0.0045 per segment — is billed separately and unchanged either way. We don't mark it up and we don't hide it inside a rounded rate. If you want the reasoning behind why that line item exists at all, we broke it down in the carrier pass-through decoded post.
Why "automatic" matters more than it sounds
Plenty of providers have volume discounts. What they usually don't have is a discount that triggers on its own inside the same billing month.
The common pattern is: you email sales, you sign a new agreement, the lower rate starts next cycle. That means the month you actually earn the discount is the month you don't get it. Ready's Growth rate applies to the segments you send past 50,000 in the month you send them. No lag, no renegotiation.
That single design detail is what makes the batching math below worth running — because it changes based on timing you control.
A worked example: the sender parked at 48,000
Say you're a business that sends roughly 48,000 segments most months — a mix of two weekly promo blasts, some appointment reminders, and a trickle of two-way replies. You're under the threshold, so everything bills at Standard.
A normal month at 48,000 segments:
- 48,000 × $0.02 = $960 in messaging
- 48,000 × $0.0045 = $216 carrier
- Total: $1,176
Now suppose your monthly send is genuinely closer to the line than you think — you've got a reactivation campaign to a 6,000-contact list you keep meaning to run, and each message is a tidy 150 characters (one segment). That campaign is 6,000 segments.
If you run it in a month where you're already at 48,000, your total for the month is 54,000 segments. Here's what that looks like:
- First 50,000 segments at Standard: 50,000 × $0.02 = $1,000
- Next 4,000 segments at Growth: 4,000 × $0.016 = $64
- Messaging subtotal: $1,064
- Carrier: 54,000 × $0.0045 = $243
- Total: $1,307
Only 4,000 of your 54,000 segments got the Growth rate. That's the reality of a mid-month crossover — the discount applies to the overage, not retroactively to everything. We walk through exactly why your blended rate isn't $0.016 the moment you cross in the 80,000-segment blended-rate post. Worth reading if you're forecasting spend, because the headline number and the real number diverge.
The batching decision: one big month vs. two lean ones
Here's where planning actually earns something.
You have two 6,000-segment campaigns queued — the reactivation blast and a seasonal promo — and your baseline is 48,000 segments a month. You can run them in the same month or split them across two.
Option A — split across two months (54,000 one month, then back to 48,000, the other campaign the following month at 54,000):
Each of those two months looks like the 54,000 example above: $1,307. But you also crossed the threshold twice, once each month, so you only ever earned the Growth rate on 4,000 segments per month. Two crossover months, two small overages.
Option B — stack both campaigns into one month (48,000 baseline + 12,000 campaign = 60,000 segments):
- First 50,000 at Standard: 50,000 × $0.02 = $1,000
- Next 10,000 at Growth: 10,000 × $0.016 = $160
- Messaging subtotal: $1,160
- Carrier: 60,000 × $0.0045 = $270
- Total: $1,430
Then the other month you're back to your plain 48,000-segment baseline: $1,176.
Let's total the two-month spend both ways:
| Month 1 | Month 2 | Two-month total | |
|---|---|---|---|
| Split (Option A) | $1,307 | $1,307 | $2,614 |
| Stacked (Option B) | $1,430 | $1,176 | $2,606 |
The difference is small — about $8 — because in this scenario both approaches push roughly the same overage over the line. The real lesson: the savings come from how many segments land past 50,000, not from how many months you touch the threshold.
Stacking helps when it moves more total segments into a single month's overage. If your baseline were lower — say 30,000 — splitting two campaigns would keep both months under 50,000, and you'd never see the Growth rate at all. Stacking them into one 42,000-segment month still wouldn't cross. In that case, batching does nothing for your rate; it's just calendar tidiness.
When batching for the tier is actually worth it
Run this quick check before you reshuffle your send calendar:
- What's your recurring monthly baseline? If it's already comfortably above 50,000, you're on Growth for the overage no matter what — batching won't change your rate.
- Are your one-off campaigns big enough to cross the line when added to baseline? If baseline + campaign clears 50,000, the segments past the line get Growth pricing. If it doesn't clear, no rate benefit.
- Would stacking campaigns push materially more segments past the line than spreading them? That's the only case where you save real money on rate.
- Does stacking hurt your list? This is the guardrail. Doubling up campaigns in one month can lift your unsubscribe rate. Chasing $0.004 per segment isn't worth burning opt-ins — we made this exact point in the frequency-cap revenue-curve post. List health beats tier math every time.
The honest version: for most senders sitting near 48,000, the tier savings from batching are modest — single or low-double-digit dollars a month. Batch for engagement reasons (a coordinated launch, a seasonal push) and take the rate benefit as a bonus. Don't distort your calendar to chase it.
Where this matters most
The tier crossover moves real money in two situations:
- You're consistently in the 50,000–80,000 range. A larger and larger share of your volume rides the Growth rate, and your blended cost per segment keeps drifting toward $0.016. Forecasting that correctly changes your budget.
- You're an agency rebilling clients. The Growth rate widens the spread between your cost and your rebill — and most agencies never adjust the client-facing price when they cross. That's margin sitting on the floor. We covered the mechanics in the 50,001-segment margin crossover post.
If you're forecasting spend for the next few quarters, model it month by month with your actual baseline, not an annualized average — averages hide the crossover.
The practical takeaway
- Ready's Growth rate ($0.016 vs. $0.02) applies automatically once you pass 50,000 segments in a calendar month. No plan change, no contract.
- The discount hits only the overage, in the month you send it — so your blended rate lands between the two published numbers, not at the lower one.
- Batching campaigns to chase the tier only pays when it pushes materially more segments past 50,000. If your baseline is well under the line, batching does nothing for your rate.
- List health outranks tier optimization. Don't double-send just to save a few dollars.
If you want to sanity-check your own numbers, plug your baseline and campaign sizes into the arithmetic above — or start with 2,500 free credits and watch how the itemized bill separates messaging from carrier, so you can see exactly where you sit relative to the line. Full pricing is on the Ready SMS page.