The 30% Gap: What Kellogg Research Says About Territory Design

The Research Behind the Number

Andris Zoltners, Prabhakant Sinha, and Sally Lorimer spent three decades studying sales territory design at Northwestern's Kellogg School of Management. Their dataset — 4,800 territories across 500 companies — produced a finding that should have reshaped how every sales organization operates.

Companies that design territories well achieve 30 percent higher sales force productivity than companies that do not.

That line comes from "Sales Territory Alignment: An Overlooked Productivity Tool" published in the Journal of Personal Selling & Sales Management (Vol 20, No 3, Summer 2000). Zoltners and Sinha went on to found ZS Associates, which has since completed over 2,000 territory alignment projects across 50 countries. The finding has held up repeatedly.

This is not a soft correlation buried in a working paper. It is the most replicated result in sales force effectiveness research.

What Does the 30% Gap Look Like in Practice?

Territory balance correlates directly to quota attainment. Zoltners and Sinha segmented companies by how well-balanced their territories were and measured quota hit rates across quartiles. The spread is stark.

Thirty-one percentage points. The companies hitting 89% are not spending more on comp or hiring better reps. They are allocating territories differently.

The Sales Management Association confirmed this independently. Their research with Xactly found nearly a 30% difference in sales objective achievement between companies effective and ineffective at territory planning. Two separate research groups. Same conclusion.

And Alexander Group's analysis found something worse: in many organizations, nearly one-fifth of all reps achieve over 150% of quota while just under half fail to reach 50%. That is not a performance problem. That is a territory design problem.

How Much Revenue Is on the Table?

When companies restructure territories based on data rather than politics, the documented revenue improvements follow a predictable pattern.

These are not redistributed dollars. This is new revenue — generated because reps are covering territories sized to their capacity, with realistic quotas attached to actual market potential. eSpatial's analysis found companies that dynamically adjust territories see up to 30% more revenue per rep than those using static models.

The math is straightforward. If half your territories are oversized and half are undersized, you are simultaneously burning out your best reps and underworking the rest. Neither group hits their number. Run a territory health audit in 48 hours.

Why This Persists

If the data is this clear, why do 55% of territories remain out of balance?

Manual processes. The SMA found that 83% of companies still rely on manual territory design — spreadsheets, gut feel, and the map on the wall. Only 36% consider their territory design efforts effective. These numbers are connected.

Rep preservation bias. Sales leaders protect their top performers' accounts. It is rational at the individual level and destructive at the organizational level. A VP who reassigns 200 accounts from a president's club winner will face immediate pushback. The revenue they are leaving on the table in other territories is invisible.

Data fragmentation. Effective territory design requires clean data on account potential, rep workload, travel time, and market penetration. Most CRMs have stale data. Many organizations cannot even agree on total addressable market by territory. Without the inputs, the optimization cannot happen.

Organizational inertia. Territory redesign is disruptive. It touches comp plans, CRM assignments, rep relationships, and manager spans. Many leaders choose to live with the 30% gap rather than manage the change. See how Contiguo handles territory rebalancing.

The Cost of Doing Nothing

Leaving territories unbalanced does not just leave revenue on the table. It compounds.

Rep turnover accelerates. Sales rep turnover averages 35% — nearly triple the 13% average across other industries. Alexander Group's research identifies territory inequity as a top driver of attrition. Reps who perceive their territories as unfair are significantly more likely to leave. Replacing a single rep costs roughly $115,000 when you factor in recruiting ($29K), training ($36K), and lost productivity during ramp ($50K), per DePaul University research.

A 5% increase in attrition raises selling costs 4-6%. For a 100-person sales org, that is 5 additional departures per year at $115K each — $575K in replacement costs alone, before counting the pipeline disruption.

Quota miss cascades. When 70% of reps miss quota — as EBSTA's 2024 benchmark found for B2B — the problem is rarely 70% of reps being bad at their jobs. It is usually territories set up so that hitting quota requires exceptional performance rather than consistent execution. Read more on how territory imbalance breaks forecasts.

What RevOps Leaders Should Do

The Kellogg research is 25 years old. The data has only gotten stronger. If your organization has not done a territory balance analysis in the last 12 months, you are almost certainly leaving 2-7% of revenue on the table.

Start with a diagnostic. Before redesigning anything, measure where you are. Calculate the coefficient of variation across territories on revenue potential, workload, and quota attainment. If the spread exceeds 15-20%, you have a balance problem worth fixing.

Use data, not gut feel. Organizations using technology for territory planning achieve 20% higher sales attainment than those using manual methods. The SPM market is growing at 17% CAGR for a reason — from $2.95B in 2025 to $7.61B by 2031.

Plan for the human side. Territory redesign without change management fails. The research findings are clear, the friction is real, and both are surmountable. Communicate the why (data, not politics), protect rep relationships where possible, and phase the rollout. See how Contiguo supports data-driven territory design.