Most deliverability pitches get funded on an operating-budget line, which means they get re-litigated every year and cut in every downturn. A stronger framing is to position the investment as a small capital project — modelled with a DCF, with explicit assumptions, sensitivities, and a terminal value — because capital projects survive budget cycles in a way operating lines do not.
This article walks through the DCF model we have used with finance teams. It is conservative, defensible, and has the property of producing a positive NPV under almost any reasonable set of assumptions — which is the whole point.
Simple ROI pitches get framed as "ongoing cost." DCF framing positions the investment as capital deployed against a multi-year revenue stream, with explicit discount rates and risk adjustments. Finance teams respect the format because it matches how they evaluate other growth investments.
The model's structure
Four components:
- Baseline: current email revenue, placement rate, and programme cost.
- Intervention: cost of deliverability monitoring and remediation capability.
- Uplift: expected placement improvement and the revenue it unlocks.
- Discount: time value and risk adjustment to produce NPV.
We run it over a 5-year horizon with a terminal value. That matches how finance evaluates marketing technology investments at most mid-market companies.
Baseline inputs
Annual email-attributed revenue $16,000,000
Current blended placement rate 82%
Target placement rate 90%
Revenue elasticity to placement 0.9
(each 1pp of placement moves
revenue by 0.9pp, reflecting
that spam-foldered messages still
produce some residual engagement)
Annual programme cost (current)
ESP fees $180,000
Team cost (allocated) $420,000
Agency/contractor $120,000
Total $720,000These are the numbers the finance team already has or can produce quickly. Nothing exotic.
Intervention costs
Continuous placement monitoring API $18,000/year
Alerting and incident infrastructure $6,000/year (cloud + tooling)
Deliverability specialist (0.3 FTE) $45,000/year
Integration and onboarding (year 1) $20,000 one-time
Annual remediation budget $15,000/year
Total year 1 $104,000
Total years 2-5 (each) $84,000/yearThis is a reasonable mid-market investment profile. Scale it up or down for larger or smaller programmes. The structure stays the same.
Expected uplift
Placement improvement from 82% to 90% — an 8pp increase — is achievable for most programmes starting from a typical baseline, but not instantly. Realistic ramp:
Year Placement Revenue uplift (vs. baseline $16M)
─────────────────────────────────────────────────────
Year 1 82% -> 86% +$576,000 (3.6% revenue lift)
Year 2 86% -> 88% +$864,000
Year 3 88% -> 89% +$1,008,000
Year 4 89% -> 90% +$1,152,000
Year 5 90% steady +$1,152,000
Uplift formula:
uplift = baseline_rev * (new_placement - old_placement) * elasticityThe ramp reflects the reality that placement improvements come in steps: initial monitoring surfaces incidents (fast wins), followed by authentication hardening (medium term), followed by reputation improvements (slow). Year 1 is the biggest single gain because the measurement reveals pre-existing incidents.
The DCF
Discount rate (WACC): 10% (typical for mid-market software company)
Year Uplift Cost Net Cash Flow PV @ 10%
──────────────────────────────────────────────────────
1 +576,000 -104,000 +472,000 +429,091
2 +864,000 -84,000 +780,000 +644,628
3 +1,008,000 -84,000 +924,000 +694,214
4 +1,152,000 -84,000 +1,068,000 +729,533
5 +1,152,000 -84,000 +1,068,000 +663,212
Terminal value (year 5 cash flow / WACC): +10,680,000
PV of terminal value: +6,632,123
NPV (5-year + terminal): +9,792,801The NPV is roughly $9.8M on a total investment of $440k over five years. Ratio of roughly 22x. Even heavy haircuts leave the number firmly positive.
Sensitivity analysis
Finance will want to see the sensitivity. Three variables matter:
Sensitivity to placement uplift
Placement ceiling Year-5 revenue uplift 5-year NPV
─────────────────────────────────────────────────────
85% (from 82%) +$432,000/year ~$3.0M
88% (from 82%) +$864,000/year ~$6.5M
90% (base case) +$1,152,000/year ~$9.8M
92% (aggressive) +$1,440,000/year ~$13.1MEven at a modest 3pp ceiling (85%), the NPV is strongly positive. The investment does not require hitting the base case to be worth making.
Sensitivity to revenue elasticity
Elasticity Base case NPV
──────────────────────────
0.6 ~$6.5M
0.9 (base) ~$9.8M
1.2 ~$13.1MElasticity below 0.6 is inconsistent with observed data from programmes that have measured before-and-after placement. The base case of 0.9 is conservative.
Sensitivity to discount rate
WACC NPV
──────────────
8% ~$11.5M
10% ~$9.8M
12% ~$8.5M
15% ~$7.1MThe NPV remains positive through any reasonable discount rate. This is a function of the favourable investment/return ratio, not a function of discount rate manipulation.
Risk-adjusted view
Risks that reduce the expected uplift:
- Provider policy changes: Gmail, Outlook, Yahoo, Apple periodically change rules. Impact: 10–20% probability of a 1–2 year delay in reaching target placement. Cost: roughly $500k reduction in NPV.
- Content or reputation drag: if the root cause of placement issues is deeper than monitoring can surface (e.g., IP reputation from shared pools), the intervention may under-deliver. Cost: roughly $1M reduction in NPV.
- Staff turnover: if the deliverability specialist role turns over, the operating cadence may degrade. Cost: roughly $300k in year-over-year uplift missed.
Expected value adjustment: approximately $1.2M reduction in the point-estimate NPV, yielding a risk-adjusted NPV of approximately $8.6M. Still strongly positive.
You cannot build this model without a measured current placement rate. Inbox Check gives you free per-provider placement tests for calibrating the baseline input, and a paid API for the continuous monitoring that the model assumes is in place throughout the 5-year horizon.
The single-slide finance summary
Finance wants one slide, not a spreadsheet. Prepare this:
Deliverability Monitoring — Capital Project Summary
───────────────────────────────────────────────────
Investment $104k year 1, $84k/year thereafter
Horizon 5 years + terminal value
Base-case NPV $9.8M (22x total investment)
Risk-adjusted $8.6M
Payback period Under 3 months
Sensitivity Positive NPV across all reasonable assumptions
Strategic rationale
Email drives 18% of company revenue; placement is
the unmeasured variable that most strongly affects it.
Recommendation: approve.One slide, structured like every other capital project finance evaluates. The deliverability conversation leaves the operational budget and joins the capital allocation queue — where it belongs given the numbers.
What the model changes about the conversation
The practical effect of presenting deliverability this way:
- The investment survives budget pressure because it is evaluated against NPV, not cost.
- It earns the right to multi-year commitment, which is what actually drives placement improvement.
- It positions the head of deliverability or marketing ops as a capital steward, not a cost centre.
None of these are minor. Getting deliverability into the capital-project frame is often the single highest-leverage political move a marketing ops leader can make.