CPL is what you pay for one lead, ROAS is revenue earned per rupee of ad spend. Lead-based businesses such as travel, interiors and services should track cost per qualified lead and then cost per booking. Online stores should track ROAS against a break-even, which is one divided by gross margin. Reach and views alone are not results.
Reports come with a dozen numbers, and owners often do not know which one decides whether the ads are working. The answer depends on how you make money. A business that sells through conversations needs a different scoreboard from one that sells through a checkout.
What do CPL, CPA, ROAS and cost per conversation mean?
| Metric | Formula | Best for |
|---|---|---|
| CPL, cost per lead | Ad spend divided by leads | Businesses that collect enquiries |
| Cost per conversation | Ad spend divided by WhatsApp or Messenger chats started | Click-to-WhatsApp campaigns |
| CPA, cost per acquisition | Ad spend divided by customers or purchases | Any business that can count sales |
| ROAS, return on ad spend | Revenue from ads divided by ad spend | Online stores and anywhere revenue is tracked |
| Cost per ThruPlay | Ad spend divided by video views watched to the end or 15 seconds | Awareness and video campaigns |
Cost per lead is the question the industry asks most: what is CPL in lead generation? It is simply spend divided by leads, and it says nothing about whether those leads were any good.
Which metric fits a local service business?
Cost per lead is a start, but the number that matters is cost per qualified lead, and then cost per booking. A cheap lead who never replies is worth nothing. Track in three steps: leads, leads who replied, leads who bought. Improve the weakest step.
For a Rajkot travel agency, Shivsagar Tours & Travels, one 30-day campaign across Bhavnagar and Rajkot produced 733 Meta leads at ₹14.28 to ₹18.12 each. That is a CPL. The number that decides value for a tour operator is how many of those turn into bookings, which is why we look past the lead count. The CPL by industry post explains what we do and do not know for other sectors.
Which metric fits an online store?
ROAS, measured against a break-even. Break-even ROAS is one divided by your gross margin. With a 40 percent gross margin, break-even ROAS is 2.5, meaning every ₹1 of ad spend must bring back ₹2.50 of revenue just to cover product cost and the ad. Anything above is profit before overheads. As an illustration, a store with a 25 percent margin needs a ROAS of 4 to break even.
ROAS depends on tracking being correct, which is a separate problem. See Meta Pixel and Conversions API: why your tracking is wrong.
For NK Creation, a jewellery brand on Shopify, one early test produced 3 WhatsApp leads at ₹63.31 each on ₹189.94 of spend. We published it with the note that it needed optimisation, and there is no ROAS on record for it. Early numbers on tiny spends are directional at best, which is why the case study says so.
Which metric fits awareness or video campaigns?
Cost per ThruPlay, or cost per 3-second and 15-second view. For the manufacturer WAZWOOD, the account we rebuilt into one disciplined campaign reports ₹0.04 per ThruPlay. That tells you how cheaply people watched a video. It does not tell you about enquiries, so it is the right metric only when the goal is awareness. Confusing the two is one of the most common reporting mistakes we see.
How do you pick the right metric for your goal?
- Name the goal. Enquiries, bookings, online sales or awareness.
- Choose the metric closest to the money. Booking or purchase beats lead, and lead beats view.
- Set a target from your own margins. What can you afford to pay for one customer?
- Track the quality step. How many leads replied and how many bought.
Then make sure your monthly report shows those numbers. Our checklist, what an agency should report every month, covers it, and the performance marketing page describes how we set targets.
How often should you review these numbers?
Look at spend, results and cost per result weekly, and judge performance monthly. Cutting a campaign after three days is a common mistake, because ad platforms need a learning period and a small daily budget produces noisy numbers. A better rule is to let a campaign run through its learning phase before judging it, then compare one month with the last, on the same metric and the same goal. If the lead quality step is weak, fix the follow-up before you change the ads. If you want to see what a monthly report should contain, our monthly report checklist lists the numbers and the questions to ask.
Key Takeaways
- CPL is spend divided by leads. It says nothing about lead quality, so track cost per qualified lead and cost per booking as well.
- Break-even ROAS is one divided by gross margin. A 40 percent margin needs a ROAS of 2.5 to break even.
- Use cost per conversation for click-to-WhatsApp campaigns and cost per ThruPlay for awareness video.
- Choose the metric closest to the money. A booking beats a lead, and a lead beats a view.
- Treat early numbers on tiny spends, such as ₹63.31 on ₹189.94, as directional only.
Before You Ask
What is CPL in lead generation?
CPL is cost per lead: your ad spend divided by the number of leads generated. If you spend ₹10,000 and get 500 leads, your CPL is ₹20. It measures how cheaply you collect enquiries and says nothing about their quality, so pair it with the share of leads who reply and the cost per booking. On a Shivsagar Tours campaign we saw CPL of ₹14.28 to ₹18.12.
Is ROAS or CPL better for a local business?
Cost per lead, and better still cost per qualified lead or booking, suits businesses that sell through enquiries such as travel, interiors and services. ROAS suits online stores and anywhere revenue is tracked to the ad. Pick the metric closest to the money, and compare it with a target set from your own margins rather than an industry average.
How do you calculate break-even ROAS?
Divide one by your gross margin as a decimal. With a 40 percent margin, break-even ROAS is 1 divided by 0.4, which is 2.5. Every ₹1 of ad spend must bring back ₹2.50 of revenue to cover product cost and the ad itself. Above that you earn margin before overheads. Lower margins need a higher ROAS, so a 25 percent margin needs 4.
*Shivsagar figures (733 Meta leads at ₹14.28 to ₹18.12) and WAZWOOD's ₹0.04 cost per ThruPlay are from the published case studies. The NK Creation figure (3 leads, ₹63.31 each, ₹189.94 spend) is an early test published with its optimisation flag, with no ROAS on record. Margin examples are illustrations.