How to Measure ROI From an SDR or BDR Agency Engagement (Formula and Worked Examples)

ROI from an SDR agency is expected gross margin from the pipeline the agency created, minus the total cost of the engagement, divided by that cost, measured on a cohort basis with the sales cycle lag acknowledged. That sentence contains every place people get it wrong: they count meetings instead of margin, they leave out half the costs, they judge month one by closed revenue, and they mix cohorts so improvement is invisible.

This guide gives you the formula, the full cost and value sides, three worked examples at different deal sizes, a method for reporting honestly before revenue lands, and a template you can build in a spreadsheet or run in our ROI calculator.

TLDR

• Formula. ROI = (pipeline created × expected win rate × gross margin − total program cost) ÷ total program cost.
• Cost side. Agency fees, set up, data, tooling, your AE time on meetings, your management time.
• Value side. Qualified meetings held → opportunities → pipeline value → expected revenue → gross margin → lifetime value where retention is known.
• Lag. Most Australian B2B deals close three to nine months after the first meeting. Report pipeline coverage and stage weighted pipeline until then.
• Payback. For mid market SaaS at $30,000 plus ACV, six to nine months is a healthy target.

Why most ROI calculations are wrong

Four errors, in the order we see them.

Counting bookings. A booked meeting is a calendar invite. Only held, qualified meetings have value, and only opportunities have measurable value. Our guide on how an outbound agency should define a qualified meeting sets the unit.

Ignoring lag. Judging a program at day 60 on closed revenue, when your average sales cycle is five months, guarantees a negative number that means nothing.

Forgetting internal costs. Your AE spends an hour in every meeting and two more following up. That time has a cost and it belongs in the denominator.

Using list price. Pipeline valued at list ACV when your realised ACV after discounting is 30 percent lower.

The cost side

Everything that would not have been spent without the engagement.

For comparison, a fully loaded in house SDR in Australia runs $140,000 to $160,000 a year (3) on a base salary of $75,000 to $90,000 (4), before ramp months at near zero output and re hiring at the typical tenure, which The Bridge Group's 2025 research puts at a median of under two years (5). Our in house vs outsourced cost analysis builds the full comparison.

The value side

Work down the funnel.

1. Qualified meetings held. The agency's output.
2. Opportunities. Meetings your AE converted to a pipeline record. 40 to 60 percent with a tight definition (3).
3. Pipeline value. Opportunities × realised ACV (not list).
4. Expected revenue. Pipeline value × your historical win rate for outbound sourced opportunities. If you do not have an outbound specific win rate, use your overall rate and note the assumption.
5. Gross margin. Expected revenue × gross margin percentage. Software might be 75 to 85 percent; services 40 to 60 percent.
6. Lifetime value adjustment. Where you know retention, multiply by expected customer lifetime. Be conservative; boards discount this heavily.

The formula, written out

ROI (percent) = (Expected gross margin − Total program cost) ÷ Total program cost × 100

Where Expected gross margin = Meetings held × Meeting to opportunity rate × Realised ACV × Win rate × Gross margin percentage.

Three worked examples

All three assume a $10,000 a month retainer, $2,000 a month of internal time and tooling, 20 qualified meetings held a month in steady state, a 50 percent meeting to opportunity rate and a 20 percent win rate. That is 10 opportunities and 2 closed deals a month at steady state. Total cost $12,000 a month.

Example A: $15,000 ACV, 70 percent gross margin (SMB SaaS). Two deals × $15,000 = $30,000 revenue. Gross margin $21,000. ROI = ($21,000 − $12,000) ÷ $12,000 = 75 percent monthly at steady state. Positive but thin; a bad month goes negative. This is why outbound below about $10,000 ACV rarely works.

Example B: $50,000 ACV, 75 percent gross margin (mid market SaaS). Two deals × $50,000 = $100,000 revenue. Gross margin $75,000. ROI = ($75,000 − $12,000) ÷ $12,000 = 525 percent monthly at steady state. Comfortable. A program at half this conversion is still strongly positive.

Example C: $150,000 ACV, 50 percent gross margin (professional services, enterprise). At this deal size, meetings per month fall (say 12) and win rate falls (say 15 percent), so roughly 6 opportunities and 0.9 deals a month. 0.9 × $150,000 = $135,000 revenue. Gross margin $67,500. ROI = ($67,500 − $12,000) ÷ $12,000 = 463 percent. Strong, but the lag is longer, so months one to six look poor on closed revenue.

The pattern: ROI is driven by deal size and win rate far more than by the price of the agency. Halving the retainer changes Example B by a few dozen percentage points. Doubling realised ACV changes it by hundreds.

A fourth example: a professional services firm with slower cycles

The three examples above assume software economics. Services firms differ in three ways: lower gross margin, longer cycles, and revenue that arrives over a project rather than as an annual contract.

Example D: $80,000 average engagement, 45 percent gross margin, nine month cycle, 15 percent win rate, 14 meetings held a month. At a 50 percent opportunity rate that is 7 opportunities and roughly one engagement a month once the cycle has run. Gross margin $36,000 against a $12,000 monthly cost. Steady state ROI = ($36,000 − $12,000) ÷ $12,000 = 200 percent. Healthy, but the first nine months show almost no closed revenue, so this program lives or dies on the pipeline coverage and stage weighted measures below. A firm that judges it on closed revenue at Day 90 cancels a program that would have paid back handsomely.

Sensitivity: which variable moves the answer most

Using Example B as the base ($50,000 ACV, 20 meetings, 50 percent opportunity rate, 20 percent win rate, 75 percent margin, $12,000 monthly cost), change one variable at a time.

Win rate and opportunity rate move the answer more than agency price does. A buyer who negotiates a 25 percent discount and accepts a looser qualification standard has made the program worse. A buyer who pays the full retainer and insists on a four test qualified meeting definition has made it better. This is the arithmetic behind our cost per qualified meeting argument.

The lag problem, and how to report honestly

Deals sourced by outbound in month one close in months four to nine. Reporting closed revenue ROI at day 90 shows a loss on every program that has ever worked. Three measures fill the gap.

Pipeline coverage. Pipeline created ÷ the pipeline you need to hit target. If the agency has created $600,000 of qualified pipeline against a $200,000 quarterly target, coverage is three times, which is where most sales leaders want it.

Stage weighted pipeline. Each opportunity valued at ACV × the historical probability of its current stage closing. Discovery 10 percent, evaluation 30 percent, proposal 60 percent, verbal 85 percent. Sum it. This moves every month and shows whether opportunities are progressing or stalling.

Cohort tracking. Opportunities created in month one tracked separately from month two, through to close. By month six you know the true win rate on the month one cohort and can stop assuming.

Leading indicators to track before revenue

Four numbers that predict the ROI before it lands.

1. Qualified meetings held per month. Against the agreed range.
2. Meeting to opportunity rate. 40 to 60 percent healthy. Below 30 percent, the ICP or qualification is off.
3. Pipeline created per month. Opportunities × realised ACV.
4. Stage progression rate. Share of opportunities that moved forward a stage this month. Stalled pipeline is the earliest sign a program is booking the wrong people.

Our pipeline conversion guide covers the funnel arithmetic behind these.

Presenting ROI to a board or CFO

Finance leaders are not hostile to outbound; they are hostile to numbers they cannot check. Five principles for the presentation.

Lead with the formula, not the result. Show how the number was built so it can be challenged line by line.

Separate what is measured from what is assumed. Meetings held, opportunities and pipeline value are measured. Win rate and gross margin are assumptions from history. Label each.

Show cohorts. A table of month one meetings through to their outcomes, month two the same. Finance leaders trust cohorts because they cannot be flattered by timing.

Include your own costs. A presentation that omits AE and management time will be caught, and everything else in it will be discounted.

Report pipeline coverage and stage weighted pipeline for the first two quarters, closed revenue thereafter. Explain the lag once, clearly, with the average cycle length from your own CRM.

Common objections from finance, and the answers

"Those meetings would have happened anyway." Attribution is legitimate. Answer with the source field in the CRM: opportunities marked outbound sourced, with the SDR's booking timestamp, separated from inbound and referral.

"Pipeline is not revenue." Correct, which is why pipeline is weighted by stage probability and tracked by cohort to close. Show the month one cohort's actual close rate once it is available.

"We could hire an SDR for less." Show the fully loaded seat cost and the ramp. Our in house vs outsourced cost analysis is the reference; the short answer is that a single in house SDR is rarely cheaper once super, tools, management, ramp and re hiring are counted.

"The win rate assumption is too optimistic." Run the sensitivity table with their number. If the program is positive at their win rate, the argument is over. If it is not, that is worth knowing.

"What if it stops working?" Month to month terms after the initial period. The downside is one month.

Illustrative payback timeline

For Example B, cumulative cost against cumulative gross margin, using a five month average sales cycle. Illustrative.

Payback in month six, a year end ROI on cumulative figures of roughly 290 percent, and a program that looked like a loss at Day 90 by any closed revenue measure.

Comparing against alternatives

The honest comparison is ROI against ROI, not agency cost against nothing.

In house SDR. Higher fixed cost, slower to first meeting, better at scale. Run the same formula with the fully loaded seat cost and a six month ramp.

Paid media. Usually cheaper per lead, far more expensive per qualified meeting for considered B2B.

Events. High cost per meeting, high trust, strong for the top of the market.

Sales consulting. Improves conversion of existing pipeline rather than creating new pipeline. Different lever. Our SDR agency vs sales consulting comparison covers when each pays.

The template

Build one sheet with these columns per month: meetings held; opportunities; realised ACV; pipeline created; stage weighted pipeline; closed won (lagged); agency cost; internal cost; total cost; expected gross margin; ROI. Add a cohort tab that follows each month's opportunities to outcome. Or use the ROI calculator, which runs the formula with your inputs and returns cost per opportunity, cost per closed deal and payback month.

What good looks like

For Australian mid market B2B at $30,000 plus ACV with closers who take meetings promptly, we see payback (cumulative gross margin exceeding cumulative cost) inside six to nine months on well run phone first programs. Faster at higher ACV, slower where sales cycles run past six months. These are Nousu operating observations, not guarantees; your win rate and cycle length decide.

How Nousu reports ROI

Nousu Collective reports meetings held, opportunities created and pipeline value monthly, and works with each client's CRM data to track cohorts to close, so the ROI conversation at renewal is based on the client's own numbers rather than ours.

The bottom line

Measure SDR agency ROI on gross margin from pipeline created, against every cost including your own team's time, with the lag acknowledged and cohorts tracked. Deal size and win rate drive the answer far more than the agency's price. Before revenue lands, watch meetings held, meeting to opportunity rate, pipeline created and stage progression. If those four are healthy, the ROI is coming.

Want your ROI modelled on your deal size and win rate before you commit? Book a 15 minute call.

Frequently asked questions

How do you calculate ROI on an SDR agency? Expected gross margin from the pipeline the agency created (meetings held × meeting to opportunity rate × realised ACV × win rate × gross margin), minus total program cost including your own team's time, divided by total program cost.

How long before an SDR agency pays back? For Australian mid market B2B at $30,000 plus ACV, six to nine months is a healthy target. Faster at higher deal sizes, slower where sales cycles run past six months.

What ROI should I expect from outsourced SDR? It depends almost entirely on deal size and win rate. At $50,000 ACV and a 20 percent win rate, steady state monthly ROI of several hundred percent is realistic. At $15,000 ACV, ROI is thin and a poor month goes negative.

Should ROI be measured on pipeline or closed revenue? Both, at different times. Pipeline coverage and stage weighted pipeline in the first two quarters, closed revenue by cohort once the sales cycle has run.

What costs should be included in SDR ROI? Agency fees, set up amortised, data and tooling, your AEs' time in and after meetings, and your management time on reviews and feedback.

Which variable has the biggest effect on SDR agency ROI? Win rate, then meeting to opportunity rate, then realised ACV and gross margin. Agency price moves the answer less than any of them. A discount paired with looser qualification lowers ROI; paying the full retainer with a tight qualified meeting definition raises it.

How do I attribute closed deals to an SDR agency? A source field on every opportunity, set at creation, marking it outbound sourced with the SDR's booking timestamp, separate from inbound and referral sources. Track those opportunities by cohort to close. Attribution disputes disappear when the field is set at the point the meeting is booked.

Sources and references

1. Nousu Collective. How Much Does Outsourced SDR Cost in Australia? Complete 2026 Pricing Guide.
2. Whistle. Outsourced SDR Pricing Guide 2026. (Set up fees.).
3. Nousu Collective. Top 8 Outsourced SDR Providers in Australia 2026. (Fully loaded in house cost; 40 to 60 percent meeting to opportunity.).
4. SEEK. Sales Development Representative Salary in AU.
5. The Bridge Group. SDR Models, Motions & Metrics: 2025 Research Report (10th ed.).
6. RepVue. Sales Development Representative Salaries in Australia. (63.6 percent quota attainment as a realism check on in house output.).