BTL activities in marketing: the full list, the lead times and the number each one answers to

BTL activities are the parts of marketing aimed at a named audience where the response can be counted and attributed: direct mail, email and SMS to your own list, sampling and demonstrations, point of sale and in store display, trade promotions and channel incentives, exhibitions, events and activations, telemarketing, loyalty and referral schemes, and performance advertising bought on purchase intent. Two tests decide whether an activity belongs on that list. Did you choose the individual people it reached, and can you tie a response back to it. An activity that passes both is below the line, whatever medium it uses.

This page is the activity catalogue: what each one is for, what it costs you in time as well as money, and the number that tells you whether it worked. For the definition of the line itself and where the vocabulary came from, see above the line and below the line marketing, and for the broad reach half of the budget, what above the line covers.

The activities, with the number each one answers to

Activity	What it is	Lead time	The number that judges it
Direct mail	Addressed post to a selected list, or unaddressed drops by area	Three to six weeks	Response rate per thousand, and cost per response
Email and SMS to your own list	Messages to people who gave you their details	Days	Revenue per thousand sent, and unsubscribes
Sampling and demonstration	Putting the product in the hand or the mouth of the buyer	Two to eight weeks	Conversion from sample to purchase, measured by code or by store
Point of sale and display	Shelf and in store material that catches the decision	Four to eight weeks	Sales uplift in participating stores against a control group
Trade promotions and channel incentives	Margin, slabs or rewards that make the distributor or retailer push	One quarter	Sell through against sell in, and margin after the incentive
Exhibitions and trade shows	A stand where your buyers already gather	Three to six months	Qualified conversations, then closed value per conversation
Events and activations	An experience built for a defined audience	Six to twelve weeks	Attendance against invitation, and the follow up booked on site
Telemarketing	Outbound calls to a list	Days	Connects per hour, and appointments per connect
Loyalty and referral	Rewards for repeat purchase or for introducing somebody	Weeks to build, then continuous	Repeat rate and referrals per active customer
Intent led performance advertising	Search and retargeting bought on a signal of intent	Days	Cost per acquisition against contribution margin

Read the lead time column before the cost column. Most below the line disappointments are scheduling failures rather than creative ones: material that arrived after the promotion started, a stand designed in the last fortnight, a sampling team booked for a week when the store was out of stock.

Choosing which activities to run

Three questions narrow the list quickly.

• Where is the buyer standing when the decision is made? In the aisle, that is display and sampling. At a desk comparing suppliers, that is search, email and a stand at the right show. In a meeting with your distributor, that is a trade scheme.
• What is the obstacle? Not knowing you exist is an awareness problem and belongs above the line. Not believing the claim is a demonstration problem. Not getting round to it is a deadline and an incentive problem.
• Can you fulfil the response? A sampling programme that generates demand your stockists cannot serve spends money teaching people to want something they then fail to buy.

The four numbers to set before you book anything

Below the line earns its reputation for accountability only when these are written down in advance, and they take ten minutes.

• Cost per contact. Total cost divided by the number of people reached, including production, postage, staff and the samples themselves.
• The response rate you are assuming. Use your own last comparable activity. Where you have none, write the figure you have assumed anyway, so the result teaches you something.
• Cost per response, and then cost per sale. The second is the one that matters, because a response is not a customer.
• Breakeven. How many sales at your gross margin cover the whole activity. Below the line is the half of marketing where this can be known, so know it.

A worked illustration with round numbers: ten thousand mailers at twenty five rupees each in print and postage is two hundred and fifty thousand rupees. At a one per cent response that is one hundred responses, so two thousand five hundred rupees per response. If one in four responses buys, that is twenty five sales at ten thousand rupees per sale of gross margin, which is two hundred and fifty thousand rupees, and the activity breaks even. The arithmetic is illustrative. Doing it with your own numbers before you commit is what turns a mailing into a decision.

Attribution: build it in before the activity starts

Every below the line activity needs one mechanism that identifies the response: a unique code or landing URL per batch, a dedicated phone number, a QR code that resolves to a tagged page, a scanned loyalty identifier, or a control group of stores that receives nothing. Choose it while the creative is being made rather than afterwards. An activity with no identifier is still marketing, but it has quietly moved above the line, because now you can only judge it on the total.

The rules that bite here specifically

Promotions and direct contact are the regulated end of marketing. In the UK, the advertising codes published by the Advertising Standards Authority include a dedicated section on sales promotions, covering availability, closing dates, eligibility and what has to be made clear in the headline claim; the codes themselves are published in full. Contact by email, text and telephone is governed separately, and the Information Commissioner's guide to electronic and telephone marketing sets out when consent is required and what records to keep. Teams in India work to the Digital Personal Data Protection Act, 2023 on the data side, and to sector rules on promotions. Read the relevant one before the artwork goes to print, because the fix afterwards is a reprint.

Digital spend, small budgets, budget splits and sales promotions

Is digital advertising a below the line activity?

It depends on how you bought it. Search advertising against purchase intent, retargeting and email to your own list are below the line in every sense that matters: chosen audience, countable response. A broad reach video buy aimed at everybody in a state is above the line even though it is digital. The medium does not decide it, the targeting and the measurement do.

Which below the line activity suits a small budget?

Email to your own list, referral, and a demonstration in front of people who are already standing where you sell. All three have a low cost per contact and a response you can count without buying anything. Exhibitions and large activations earn their place once there is a sales process waiting to pick up what they generate.

How much of the budget should go below the line?

Set it from the obstacle rather than from a ratio. A business nobody has heard of with a strong product is under spending above the line. A well known business with flat conversion is under spending below it. Write down which of those you are, then allocate.

What is the difference between a BTL activity and a sales promotion?

A sales promotion is one type of below the line activity: a temporary incentive to buy now. The category also holds activities with no incentive at all, such as a demonstration, a trade show stand or a telephone call.

How soon should a below the line activity be read?

Read the mechanics within days and the outcome at the end of the window plus one purchase cycle. Mail and sampling both produce a tail, so closing the report the morning after the last drop understates the result.

One below the line question nobody has in the report yet

The whole appeal of this half of marketing is that the response is countable, which is why it tends to be run by the people most interested in evidence. There is one place where the evidence is currently missing. At the moment a buyer is deciding, a growing share of them type the question into ChatGPT, Gemini or Perplexity: which supplier handles this, who is any good in this city, what should I pay. The answer that comes back names two or three businesses and it reaches a buyer who is as close to purchase as anybody your stand or your mailer reached. No code, no coupon and no control group will pick that up.

It is worth measuring the same way you would measure a drop: ask the question in the buyer's words, record which businesses get named, and repeat it next quarter to see whether the answer has moved. For a team that already counts everything, it is one more line in the pack, and AI Knows Us is where that line can live: the same buyer questions, put to each assistant, with the businesses and the cited pages written down each time.