10-reverse-kpi-global

Reverse KPI Calculation (Global)

Calculate marketing budget by working backward from revenue goal — or forward from available spend to expected revenue. Universal math; currency and benchmark numbers vary per region (US/EU/SEA/LATAM).

For newbies — Read this first

If you've never run a reverse KPI calc:

Reverse KPI = working backward from a goal. Instead of "I'll spend $5K and see what happens," you say "I want $50K in revenue, so I need X impressions, Y leads, Z customers — therefore the budget is $W."
It works in two directions:
- Backward: Revenue target → required spend (when you have a goal)
- Forward: Available spend → expected revenue (when you have a budget)
You always run 3 scenarios. Pessimistic (worst case), Realistic (base case), Optimistic (best case). One number is dangerous — three numbers force you to stress-test.
Conversion rates are the leverage. Small changes in conversion (e.g., 50% → 55%) cascade up the funnel and change your budget significantly.
Currency matters. A 5% margin in USD is different in EUR, BRL, or VND. Always pick the right region variant for your benchmarks.
Don't trust round numbers. "100 leads" is suspicious — real funnels produce odd numbers like 87 or 213.
Time horizon affects budget. A $50K monthly target needs different planning than a $50K annual target. Always specify the period.

Step 0 — Read context + select region variant

Before calculation:

Read .agents/product-marketing-context-global.md — get product, AOV, region, currency, target market.
Pick region variant for benchmark conversion rates and CPM/CPL:
- variants/01-us.md — USD, US benchmarks
- variants/02-eu.md — EUR/GBP, EU benchmarks
- variants/03-sea.md — USD/local, SEA benchmarks
- variants/04-latam.md — USD/BRL/MXN, LATAM benchmarks
Confirm direction: Reverse (revenue → spend) or Forward (spend → revenue)?

Information gathering

Ask user up to 4 questions:

What is the goal? Revenue target $X/month? Or available budget $Y to allocate?
Product/service and AOV? Average order value or deal size in your currency.
Industry and current channel mix? Industry niche? Channels currently running? Any existing CPL/CPM data?
Campaign duration? 1 month? Quarter? 6 months? Phased?

Two calculation directions

Direction 1 — Reverse: Revenue → Budget

Use when: "I want to hit $200K/month — how much ad spend do I need?"

Revenue target
  / AOV (average order value)
  = ORDERS NEEDED
  / Booking → Customer rate
  = BOOKINGS NEEDED
  / Lead → Booking rate
  = LEADS NEEDED
  / Click → Lead rate
  = CLICKS NEEDED
  / CTR
  = IMPRESSIONS NEEDED
  × CPM / 1000
  = TOTAL AD BUDGET

For e-commerce (no booking step):

Revenue target
  / AOV
  = ORDERS NEEDED
  / Conversion rate
  = SESSIONS NEEDED (clicks)
  / CTR
  = IMPRESSIONS NEEDED
  × CPM / 1000
  = TOTAL AD BUDGET

For B2B (longer funnel):

Revenue target
  / ACV (annual contract value)
  = CUSTOMERS NEEDED
  / Win rate
  = OPPORTUNITIES NEEDED
  / SQL → Opportunity rate
  = SQL NEEDED
  / MQL → SQL rate
  = MQL NEEDED
  / Lead → MQL rate
  = LEADS NEEDED
  → continue with CPL × LEADS NEEDED = SPEND

Direction 2 — Forward: Budget → Revenue

Use when: "I have $50K — how much revenue can I expect?"

Budget
  / CPM × 1000
  = IMPRESSIONS
  × CTR
  = CLICKS
  × Click → Lead rate
  = LEADS
  × Lead → Booking rate
  = BOOKINGS
  × Booking → Customer rate
  = ORDERS
  × AOV
  = REVENUE

3-Scenario sensitivity analysis (universal)

Scenario structure

Always run three scenarios:

Variable	Pessimistic	Realistic (Base)	Optimistic
CPM	Industry avg + 30%	Industry avg	Industry avg − 20%
Click → Lead	Industry avg − 15%	Industry avg	Industry avg + 15%
Lead → Booking	Industry avg − 10%	Industry avg	Industry avg + 10%
Booking → Customer	Industry avg − 10%	Industry avg	Industry avg + 10%

Reading the results

Pessimistic = budget needed for safety / FX swings / first-month learning curve
Realistic (Base) = the actual planning number
Optimistic = aspiration target, used for stretch KPI or commission triggers

Use Base for budget. Use Pessimistic as buffer. Use Optimistic as stretch goal.

Sensitivity (which lever moves the budget most?)

Variable	Base value	Change +10%	Budget change	Sensitivity
CPM	[#]	+10%	+10%	Direct 1:1
CTR	[#]%	+10%	-9%	High
Click→Lead	[#]%	+10%	-9%	High
Lead→Booking	[#]%	+10%	-9%	High
Booking→Customer	[#]%	+10%	-9%	High
AOV	[#]	+10%	-9% (fewer orders needed)	Indirect

80/20 rule

The two highest-leverage levers are usually:

CPM — controlled by creative + targeting → optimize via A/B testing
Lead → Booking — controlled by sales/CS quality → optimize via script + response speed

Break-even calculation

Break-even orders = Fixed costs / (AOV − Variable cost per order)
Break-even days = Break-even orders / (Avg orders per day)

Item	Value
Fixed costs/month (rent, salary, tools, software)	[#]
Ad spend (variable, but allocated upfront)	[#]
Total fixed	[#]
AOV	[#]
Variable cost per order (COGS, shipping, fees)	[#]
Profit per order	AOV − VarCost = [#]
Break-even orders	Total fixed / Profit per order
Break-even days	BE orders / 30

Result	Meaning	Action
BE < 50% of expected orders	Safe — good margin buffer	Can scale spend
BE = 50–80% of expected	Tight — limited margin	Optimize cost first
BE > 80% of expected	Risky — easy to lose	Cut costs or raise AOV

Budget allocation by phase

Phase	% of budget	Duration	Goal	Primary KPI
Teaser / Awareness	15%	Week 1	Curiosity, brand build	Reach, video views, saves
Soft launch	20%	Week 2	Test creative, first leads	CPL, lead, A/B test data
Full launch	40%	Weeks 3–4	Scale winners, drive sales	ROAS, orders, revenue
Maintenance + retarget	25%	Week 5+	Retarget, nurture, repeat	CPA, LTV, retention

Example allocation (budget $80K/month)

Phase	%	Amount	Days	Daily
Teaser	15%	$12K	7	$1,714/day
Soft launch	20%	$16K	7	$2,286/day
Full launch	40%	$32K	14	$2,286/day
Maintenance	25%	$20K	balance	depends on remaining days

Channel allocation principles

Proven channel → 60-70% of budget. Don't dilute by spreading evenly.
New / test channel → 15-20% of budget. Enough to gather data, not enough to bleed cash.
Retarget → 10-15% of budget. Highest ROAS — target previously engaged users.
Switch channels when ROAS < 2x for 2 weeks. Don't wait too long.

ROI projection timeline

Phase	Duration	Expectation	Track
Testing	Weeks 1–2	No orders yet, testing creative + audience	CPM, CTR, CPL
First results	Weeks 3–4	First orders, ROAS still low	First orders, leads
Optimization	Month 2	ROAS improving, stabilizing	ROAS, CPA
Scale	Month 3+	Stable ROAS, controlled budget increases	ROAS held, revenue up
Mature	Month 6+	Self-running, enough data to forecast	LTV, retention, organic %

Rules of thumb

Rule	Explanation
First 2 weeks lose money	Learning cost — don't panic, don't pause
Base ROAS achieved by month 2	Month 1 is testing, don't judge ROAS yet
Scale budget max 20%/week	Faster scaling = performance drops, CPM rises
ROAS drops 30% when scaling	Normal — wider audience = lower conv rate
Retarget ROAS 2-3x prospecting	Always allocate budget for retargeting

Cross-reference

Need	Skill
Full marketing plan first	`00-marketing-plan-global`
Current performance to inform calc	`03-performance-eval-global`
Competitive spend benchmarks	`08-competitor-research-global`
Customer insight to refine conv rates	`09-customer-insight-global`
Post-campaign data analysis	`13-data-analysis-global`

Quality checklist

Before delivering reverse KPI report:

Region variant selected — currency and benchmarks match user's market
Direction confirmed (reverse vs forward)
Industry-specific conversion rates used (not generic averages)
All 3 scenarios calculated (pessimistic, base, optimistic)
Sensitivity analysis identifies top 2 levers + how to improve them
Break-even calculated with risk grade
Phase allocation has specific timeline
Channel allocation matches industry mix
ROI timeline realistic (no "ROAS 5x in week 1" promises)
Total budget consistent across phase + channel breakdowns
Seasonality noted if campaign falls on Q4/Tet/Carnival/Black Friday
Currency conversion documented if cross-border