September 5, 2026 · 8 min read
Commission Plans for Expansion Selling: The Separate Rate Table Your NRR Needs
By Michael Brown
The Default Rate Is the Wrong Rate
Most founders copy their new-logo commission rate onto expansion deals and call it a day. Usually 7-10% of first-year ACV, applied equally to a signed upsell order form as to a new customer. It feels consistent. It is not.
A new-logo deal costs you a sales cycle. Cold outreach, demos, legal review, procurement, 60-to-90-day close timeline. Your AE burns real time, and the commission is buying down a meaningful portion of that CAC. The expansion deal on the same account exists because your CSM or AE sent one email and joined a 30-minute call. The selling motion is fundamentally different. Paying the same rate treats them as equivalent when the underlying economics are not close.
The incentive signal your reps receive when the rates are identical: close new logos, because the pipeline is bigger and each deal pays the same percentage. Expansion becomes the thing you get around to when you have a free Tuesday.
For a SaaS company at $3M ARR with a $40K average new logo ACV and a $12K average expansion, that indifference costs you compounding NRR points. Expansion revenue from existing customers is already the highest-margin growth motion you have. When the commission table doesn't reflect that, reps reflect it back to you in their calendar.
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Who Owns Expansion: AE, CSM, or Dedicated Role?
Before you design rates, settle the ownership question. You have three models.
AE-owned expansion. The account executive who closed the logo retains upsell responsibility indefinitely. Works at sub-$2M ARR when your headcount is thin and your AEs know their accounts well. Breaks down when AEs hit quota on new logos and stop returning expansion calls.
CSM-owned expansion. Customer success manages renewals and upsells. Common at $2M-$7M ARR. The problem is CSMs are usually hired on a retention mandate, not a selling mandate. Asking them to run discovery calls and quote expansions without dedicated sales training, a real quota, and a real commission plan is how you get polite relationship management instead of revenue.
Dedicated expansion role (sometimes called an Account Manager or Commercial AM). A separate headcount focused exclusively on existing accounts. Makes sense at $5M+ ARR when you have enough logos to fill a book of business. This role needs its own commission plan from day one.
Whichever model you pick, you need a clean handoff rule. "The CSM handles it" with no quota and no defined commission is not a rule. It's an avoidance strategy. Your account expansion strategy needs explicit ownership at each stage, or accounts drift until renewal.
If you're splitting ownership (AE closes, CSM expands), you also need to decide who gets commission on each deal type. Split credit arrangements where both parties receive partial commission on the same transaction work if the split is pre-defined and documented. They collapse when reps negotiate it deal-by-deal.
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The Math Behind a Separate Expansion Rate Table
Let's ground this in numbers. Assume your average new-logo deal requires:
- 45-day sales cycle
- 3.5 hours of AE time per week during that cycle (demos, calls, email, legal review)
- Total AE time cost: roughly 63 hours at a fully-loaded hourly cost of $80 = $5,040 in internal selling cost per deal
Now your average expansion deal:
- 2-week process
- 1.5 hours of CSM or AE time
- Total internal selling cost: roughly 5 hours = $400 in internal selling cost
Same 8% commission on a $40K new logo: $3,200 commission + $5,040 internal cost = $8,240 total selling cost. Same 8% commission on a $12K expansion: $960 commission + $400 internal cost = $1,360 total selling cost.
The expansion commission at 8% represents 71% of your total expansion selling cost. The new-logo commission at 8% represents 39% of your total new-logo selling cost. You're already paying a higher effective cost ratio on expansion relative to the selling effort, and that's before you account for the fact that expansion dollars carry no implementation cost, no onboarding cost, and no CAC in the investor sense.
Now run the scenario where you raise the expansion commission to 12% on that same $12K deal:
- Commission: $1,440
- Internal selling cost: $400
- Total: $1,840
You've paid $480 more to the rep. In exchange, you get: a rep who actively pursues expansion, a higher close rate on the deals they do work, and a compounding NRR effect. If that 12% rate drives 5 additional expansion deals per quarter at $12K each, that's $60K incremental ARR per quarter. $240K annualized. The $480 per deal upside to the rep costs you roughly $2,400 in added commission on those five deals. The return is not close.
Understanding your CAC payback period by sales motion makes this clearer: expansion has the shortest payback of any motion because it carries near-zero acquisition cost and the customer already has a live contract.
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How to Structure the Table: Three Variables to Set
Rate
The market range for B2B SaaS expansion commission (as of September 2026) runs 8-15% of net new ACV. For context, new-logo rates typically run 7-10% of first-year ACV on deals under $50K ACV.
A reasonable starting point: set your expansion rate 2-4 percentage points above your new-logo rate. If your AEs earn 8% on new logos, pay 10-12% on expansion. The premium is justified by the math above and the behavioral signal you're buying.
One nuance: expansion on a multi-year renewal is not the same as a mid-cycle upsell. Mid-cycle upsells (seat adds, product adds, usage overages converted to committed tiers) deserve the full expansion rate. Renewal uplifts (a 5% price increase baked into renewal terms) should be handled differently, either a flat spiff per renewal above a threshold or a lower rate, because the rep's work there is retention, not selling.
Quota
Expansion quota design is where most plans fall apart. Common mistake: taking each rep's book of business, applying a flat expansion target (say, 20% of base ARR), and calling it a quota.
The problem is that your accounts don't expand at uniform rates. A logo in month three with low adoption has almost no expansion potential. A two-year customer using 80% of their licensed seats has obvious pipeline. A flat percentage quota penalizes reps with young or under-adopted accounts through no fault of their own.
Better approach: build expansion quotas account-by-account using two inputs, adoption rate and current spend vs. ceiling. If a customer is at 65% of their contracted seats, their expansion quota contribution is zero until they hit 80%. At 80%+, they enter the active pipeline. Sum the account-level targets to build the rep's quota. It takes more work to set up and requires a data feed from your product, but it prevents the "I'm behind quota and there's nothing I can do" scenario that drives turnover.
Accelerators
Tiered accelerators on expansion work when your deal sizes vary enough to make them meaningful. If your typical expansion ranges from $5K to $50K, a 1.2x multiplier above $25K expansion in a quarter gives reps a real financial reason to push for the bigger commitment rather than the easy starter package.
If your expansion deals are consistently under $10K, skip the accelerator. The administrative complexity of tracking tiers isn't worth it at that deal size.
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Common Design Mistakes (and the Unit Economics Cost of Each)
Paying the same rate but capping expansion commissions. Caps kill the signal entirely. A rep who hits the cap in month two has zero incentive to close anything in months three and four. You've now created a commission plan that punishes your best performer.
The dead zone: no commission on expansion under a threshold. Some plans pay nothing on expansion below $5K. The logic is to avoid processing overhead on micro-deals. The result is reps who round-trip their customers to "almost $5K" expansions and walk away, because $4,800 in net new ARR earns them zero. If your minimum meaningful expansion is $2K, start the commission table at $2K.
Tying expansion commission to renewal. This is the most dangerous structure. When you pay the same commission event for "customer renewed and expanded" vs. "customer expanded mid-cycle," you're training your rep to hold expansion conversations hostage to renewal timing. Mid-cycle expansion is worth more to you (it accelerates cash and locks in behavior) than renewal-time expansion. Pay for them separately with separate triggers.
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A Reference Commission Table You Can Adapt
Below is a sample structure for a B2B SaaS company at $3M ARR with an average new-logo ACV of $35K and an average expansion deal of $10K-$18K.
| Deal Type | Commission Rate | Accelerator | Notes |
|---|---|---|---|
| New logo (under $35K ACV) | 8% | None | Standard close |
| New logo ($35K+ ACV) | 8% + 1.5x above $35K | On ACV above threshold | For enterprise motion |
| Mid-cycle expansion | 12% | 1.25x above $20K net new | Triggered at order form signature |
| Renewal uplift (price increase only) | $500 flat spiff | None | No percentage; it's a retention action |
| Renewal + expansion combined | 12% on net new ACV only | 1.25x above $20K | Renewal base renews at zero commission |
Rollout: don't change the rate table and the quota structure simultaneously. In month one, introduce the expansion rate change only. Let reps see the higher commission hits in their paycheck before you layer in account-by-account quotas. In quarter two, introduce the quota model. By quarter three, add accelerators if deal size justifies it.
What healthy quota attainment actually costs at under $10M ARR is relevant here: if you're moving from informal expansion targets to a real quota, budget for a quarter where attainment looks low while reps adjust their behavior. That's expected. The NRR trend is the metric to watch, not Q1 quota attainment on the new plan.
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Your commission table is a policy document. It tells your reps, in precise financial terms, which deals the company actually wants them to close. If it doesn't say expansion deals loudly and clearly, your reps will hear it the way you wrote it: quietly, and after they've already prioritized something else.
Frequently asked questions
What commission rate should I pay on expansion deals in SaaS?
Most B2B SaaS companies run expansion commissions at 10-15% of net new ACV, compared to 7-10% for new logos. Setting the expansion rate 2-4 percentage points above your new-logo rate creates a clear incentive without breaking unit economics, since expansion deals carry near-zero acquisition cost.
Should the AE or CSM own expansion commission?
It depends on ARR stage. Under $2M ARR, AE-owned expansion is practical. Between $2M-$7M ARR, CSM-owned expansion works if the CSM has a real commission plan and quota, not just a retention mandate. Above $5M ARR, a dedicated Account Manager role typically outperforms split ownership.
How do I set expansion quotas without penalizing reps on slow-growth accounts?
Build quotas account-by-account using adoption rate and current spend vs. ceiling. Accounts below 80% seat utilization or equivalent adoption threshold contribute zero to the expansion quota until they cross that mark. This prevents reps from being penalized for accounts that have no realistic expansion potential yet.
Is it a mistake to pay the same commission on renewals and expansions?
Yes. Tying expansion commission to renewal timing trains reps to hold upsell conversations hostage until renewal, which delays cash and creates perverse churn risk if the expansion conversation goes badly. Pay mid-cycle expansion and renewal uplifts as separate events with separate triggers and different rates.
What happens if I cap expansion commissions?
Caps eliminate the incentive for high performers to close expansion deals after they hit the ceiling. A rep who maxes out in month two has zero financial reason to pursue expansion in months three and four. Uncapped expansion commissions with accelerators above a deal-size threshold produce better revenue outcomes.