Per-Resolution vs Flat Pricing for Ecommerce Support: The Math

The pitch for per-resolution pricing sounds good

Pay only when the AI actually resolves a customer conversation. Zero charge if it escalates to a human. You get alignment, not risk.

That's the pitch. For stores doing fewer than 500 tickets a month, it can work. The problem shows up when volume climbs and when spikes become normal. Black Friday, a product launch, an influencer mention, any growth at all turns per-resolution pricing into a surprise invoice.

This post runs the math at 1,000 and 3,000 monthly tickets, shows where the break-even sits, and explains why most Shopify stores end up better off with flat pricing once they leave the startup stage.

What per-resolution pricing actually means

Per-resolution pricing is a billing model where you pay a fixed fee each time the AI closes a customer conversation without handing it to a human. If the AI escalates, you're not charged for that conversation.

The unit price varies by vendor. Current market rates in 2026:

• $0.62 per resolution at the low end (McKinsey 2026 service operations sample)
• $0.99 to $2.00 per resolution is typical for mid-tier AI platforms
• Above $3.00 per resolution is Gartner's prediction for 2030, driven by rising data center costs and vendors moving from growth subsidies to profitability

The appeal is simple: you don't pay for failures. But you also don't know your monthly bill until the month is over.

The math at 1,000 tickets a month

Assume your AI resolves 70% of inbound tickets without human help. That's a realistic automation rate for a well-tuned agent handling product questions, order status, and basic returns.

• Total monthly tickets: 1,000
• AI-resolved (70%): 700
• Escalated to human (30%): 300

Per-resolution pricing

At $1.00 per resolution (a middle-of-the-road 2026 rate):

• Monthly AI cost: 700 × $1.00 = $700

Flat pricing

kolton.ai Growth plan: $99/month, includes 1,600 AI replies. You're well under the quota, so the bill is $99 regardless of whether you use 700 or 1,400 replies.

The gap

Per-resolution pricing costs 7x more at this volume.

Even at a lower per-resolution rate of $0.62:

• Monthly AI cost: 700 × $0.62 = $434

Still 4.4x the flat plan.

The math at 3,000 tickets a month

Now assume growth. A product goes viral, you run a sale, or you simply scale from 30 to 100 orders a day.

• Total monthly tickets: 3,000
• AI-resolved (70%): 2,100
• Escalated to human (30%): 900

Per-resolution pricing

At $1.00 per resolution:

• Monthly AI cost: 2,100 × $1.00 = $2,100

At $0.62 per resolution:

• Monthly AI cost: 2,100 × $0.62 = $1,302

Flat pricing

kolton.ai Growth plan at $99/month includes 1,600 replies. You're now over quota. The next tier is Pro at $299/month, which includes 5,000 replies. The Pro plan covers 3,000 tickets with room to spare.

The gap

Per-resolution at $1.00 costs $2,100. Pro flat pricing costs $299.

That's a $1,801 difference every month. Over a year, the per-resolution bill is $21,600 higher.

Even at the lower $0.62 rate, per-resolution costs $1,302 vs $299 flat, a $1,003 monthly gap or $12,036 annually.

Where per-resolution pricing breaks down

The model has three structural problems for growing ecommerce brands:

1. Spikes punish growth

Every good thing that happens to your store (a sale, a press mention, a TikTok hit) increases your AI bill. The worse the spike, the bigger the surprise.

Black Friday weekend might generate 10,000 tickets. At $1.00 per resolution and 70% automation, that's a $7,000 AI bill for four days. The following week, when ticket volume drops to normal, your bill drops too. But you can't budget for it.

Flat pricing means your Black Friday AI cost is identical to a quiet Tuesday in February.

2. You optimize for the wrong thing

Per-resolution pricing creates an incentive to avoid automation. If you're not sure the AI will handle a ticket well, you route it to a human to avoid the charge. That keeps your AI bill down, but it also keeps your team underwater.

The right goal is maximum safe automation. Flat pricing lets you chase that without watching the meter.

3. The per-conversation trap is worse

Some platforms charge per conversation instead of per resolution. You pay whether the AI resolves the issue or not.

A recent comparison from Fin (January 2026) showed a store paying $0.80 per conversation ended up with a $7,825 higher monthly bill than the same store on per-outcome pricing, because every interaction triggered a charge regardless of whether it closed the loop.

Per-resolution is better than per-conversation, but both share the same flaw: your bill scales with activity, not value.

When per-resolution pricing makes sense

It's not always the wrong model. Per-resolution works if:

• You're under 500 tickets a month and expect to stay there
• Your ticket volume is stable and predictable (rare in ecommerce)
• You have a finance team that wants to tie AI spend directly to resolution metrics and can absorb monthly variance

For most Shopify stores, none of those conditions hold. Ticket volume swings with sales, launches, seasonality, and any attempt at growth. The per-resolution model turns every good month into an expensive one.

Why flat pricing protects you

Flat pricing (sometimes called "all-you-can-eat" or subscription pricing) charges one monthly fee regardless of ticket count, up to a plan quota.

The advantages:

• Predictable budgeting. Your AI line item is the same every month. Finance can model it a year out.
• No penalty for growth. A spike in orders or a viral post doesn't change your bill.
• Alignment with your goals. You want more automation, not less. Flat pricing removes the friction.
• Easier to compare. One number vs a unit rate times an unknown monthly count.

The tradeoff: if your ticket volume is extremely low, you might pay for capacity you don't use. But most stores find that the insurance value of a fixed bill outweighs the risk of overpaying in slow months.

The breakeven point

When does per-resolution become cheaper than flat?

Take kolton.ai Growth at $99/month. Assume $1.00 per resolution. Breakeven is at 99 resolved tickets per month.

If your AI resolves fewer than 99 tickets a month, per-resolution is cheaper. If it resolves 100 or more, flat wins.

At 70% automation, 99 resolved tickets means about 141 total inbound tickets. That's under 5 tickets a day.

Most live Shopify stores doing more than $10K/month in revenue see higher ticket volume than that. Once you're above the breakeven line, every additional ticket widens the gap in favor of flat pricing.

Comparison table: per-resolution vs flat at common volumes

Monthly tickets (total)	AI-resolved (70%)	Per-resolution cost @ $1.00	Per-resolution cost @ $0.62	Flat cost (kolton.ai Growth)	Flat cost (kolton.ai Pro)
500	350	$350	$217	$99	$299
1,000	700	$700	$434	$99	$299
2,000	1,400	$1,400	$868	$99	$299
3,000	2,100	$2,100	$1,302	$299 (Pro)	$299
5,000	3,500	$3,500	$2,170	$299 (Pro)	$299

What happens when you go over quota on flat pricing

On paid kolton.ai plans (Starter, Growth, Pro), going over your included AI replies does not stop the agent and does not add a surprise charge. The bill in a spike month is identical to the bill in a quiet month.

If a store consistently runs above its plan quota, the answer is moving to the next tier, not absorbing overage fees. There are no overage fees.

That's different from most flat-pricing models in SaaS, which either block usage or switch to per-unit billing once you hit the cap. kolton.ai treats the quota as a plan-sizing guide, not a hard gate.

Key takeaways

• Per-resolution pricing looks safe because you only pay for successful automations, but the total monthly bill becomes unpredictable as ticket volume grows.
• At 1,000 tickets a month with 70% automation, per-resolution pricing at $1.00 per resolution costs $700. Flat pricing (kolton.ai Growth) costs $99.
• At 3,000 tickets a month, per-resolution costs jump to $2,100 vs $299 on a flat Pro plan, a $1,801 monthly gap.
• Flat pricing removes the penalty for growth. A Black Friday spike doesn't change your bill.
• Per-resolution makes sense only if ticket volume is very low (under 150/month) and stable, which is rare for any growing Shopify store.
• On kolton.ai paid plans, going over your reply quota never adds a charge and never blocks the agent.

FAQ

Q: What counts as a "resolution" on per-resolution pricing?

A: A resolution is a conversation the AI closes without escalating to a human. The exact definition varies by vendor. Some count any reply as a resolution. Others require the customer to stop responding (indicating satisfaction). Some require an explicit close action like marking a ticket solved. Read the fine print, because the difference changes your effective cost per ticket.

Q: Do I get charged for spam or bot traffic on per-resolution pricing?

A: Depends on the vendor. Some platforms charge for every inbound message the AI responds to, including spam. Others filter obvious spam before charging. On flat pricing, spam doesn't change your bill at all.

Q: If I go over my plan quota on kolton.ai, what happens?

A: The agent keeps working. Your bill does not change. If you consistently run above quota, you'll get a recommendation to move to the next plan tier, but there are no overage fees and no service interruption.

Q: Can I mix per-resolution and flat pricing, using per-resolution for spikes?

A: In theory, yes, but most vendors don't offer hybrid billing. You're on one model or the other. Even if a vendor allowed it, managing two billing systems for the same function adds complexity without much benefit. Flat pricing already covers spikes.

Q: What if my ticket volume is seasonal?

A: That's exactly when flat pricing wins. If you do 500 tickets in January and 5,000 in November, per-resolution pricing punishes your best month. Flat pricing keeps your cost stable and lets you focus on converting the surge into revenue.

Q: Is per-resolution pricing going up or down in 2026?

A: Current trend is up. Gartner predicts GenAI cost per resolution will exceed $3 by 2030, driven by rising data center costs and vendors shifting from subsidized growth to profitability. The $0.62 and $0.99 rates we see today are likely the floor, not the ceiling.

The bottom line: flat pricing wins for stores that want to grow

Per-resolution pricing trades predictability for the illusion of alignment. The math works at very low volume, but once you're handling more than a few hundred tickets a month, the bill spirals.

Flat pricing removes the penalty for doing well. A product launch, a successful ad campaign, or a seasonal spike doesn't become a budget problem. You pay the same price whether you handle 200 tickets or 2,000 (within your plan tier).

For Shopify stores serious about scaling, flat pricing is the model that aligns with growth, not against it. You can see kolton.ai's flat pricing here, including exactly what's included in each plan and the reply quotas.