8 Steps to Estimate Your Inventory for Hot Sale in 2026

These are the 8 steps to estimate your inventory for Hot Sale and avoid stockouts or overstock:

1. Calculate your base demand by SKU, not by intuition
2. Plan three scenarios, not just one
3. Classify your catalog into star, support and slow SKUs
4. Calculate safety stock according to your actual replenishment time in the campaign
5. Adjust by channel, because marketplace, own website and B2B do not behave the same
6. Consider the impact of discounting on exit velocity
7. Define a point of no return to stop purchases
8. Review inventory every day of the campaign

In Mexico, Hot Sale is no longer just another campaign on the commercial calendar. The 2026 edition will be held fromMay 25 to June 2, and the 2025 edition closed with42,725 million pesos in sales, a 23.7% higher than the previous year. The ecommerce retail in Mexico reached789,700 million pesos in 2024, which explains why an inventory error on these dates can be very expensive.

The problem is not “buying more.” The problem isestimate better. Falling short on winning SKUs destroys sales. Staying with immobilized merchandise destroys margin. Both mistakes are costly and both are avoidable.

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The 8 steps to estimate your inventory for Hot Sale without stockouts or overstock

The Hot Sale concentrates traffic, discounts, advertising investment and peaks by category in just 9 days.The most common mistake is not miscalculating total demand: it is calculating with a single flat figure when the reality of the campaign has curves, different moments and very different behaviors by SKU and by channel.

In Hot Sale 2025, the most active categories includedbeauty and personal care, electronics and appliances, fashion and footwear, and home. Conversion doesn't just depend on traffic: it depends on price, urgency, reviews and availability. If your inventory is not well sized, none of those variables are of any use.

Step 1: Calculate your base demand by SKU, not by intuition

The first typical mistake is to project inventory “by eye” because the event promises more traffic. The most useful way to start is to calculate adaily base demand for SKU with three cross-references: average sales of the last 6 to 8 weeks, sales of the same promotional period of the previous year, and recent trend of the online channel.

A solid formula:50% weight to the recent history, 30% to the previous Hot Sale and 20% to the adjusted growth of recent weeks. That gives you a mixed starting point, not a bet on a single data point.

Step 2: Plan three scenarios, not just one

In massive campaigns, the problem is not just predicting: it isabsorb uncertainty. Trading on a single forecast is bad practice. It is advisable to work with three scenarios regarding your daily base demand:

• Conservative: +10% to +20% on your base. Applies if the advertising investment will be moderate or the discount is not aggressive.
• Likely: +25% to +50%. The most frequent range in Hot Sale for active SKUs with visible discount and reasonable ad spend.
• Aggressive: +60% or more. Applies if there will be a strong ad spend on the marketplace, a discount above 30% or a history of strong takeoffs.

This way you don't buy “a number”, but you define aoperating band with a minimum that you must have and a maximum that you must not exceed.

Step 3: Classify your catalog into star, support and slow SKUs

Not all products deserve the same level of inventory protection.The star SKUs They concentrate sales and margin: here you prioritize availability and quick replenishment.The SKUs of support They complement the cart and increase the average ticket.Slow SKUs They are the ones that most often end up in overstock if you allocate capital to them for fear of falling short.

Step 4: Calculate safety stock according to your actual replenishment time in the campaign

Formula:(expected maximum daily sale × maximum replenishment time) − (average daily sale × average replenishment time).

The common mistake is using the supplier's “ideal” replenishment time. In Hot Sale, supplier, picking, transportation and reception are also stressed. Always work with astressed lead time, not with the optimistic estimate.

Step 5: Adjust by channel

In marketplacethere are usually faster and more price-sensitive spikes. In an online storeThe pattern and conversion rate are more influential. InB2B or wholesaleThe repurchase and the large punctual order weigh more. Inventory allocation should reflect that distribution, not ignore it.

Step 6: Consider the impact of discounting on exit velocity

Discounting radically changes inventory velocity. If a product sells 4 units a day under normal conditions and you put it in with free shipping and a visible discount, the real multiple could be 2x or 3x. Ignoring this is one of the most direct paths to stockout in the first days of the campaign.

Step 7: Define a point of no return to stop purchases

Overstock often appears due tocontinue reordering when the peak has passed. The specific rule is: if the projected post-campaign sell-through falls below a certain threshold, it is not repurchased. Define that point before the campaign starts, not when you are already on day 6 with time pressure.

Step 8: Review inventory every day of the campaign

Your minimum daily dashboard should include: sales by SKU, sell-through, days of coverage remaining, orders pending filling, inventory level by channel and cancellation or rejection rate, key elements to achieve a impeccable inventory control.

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The three scenarios that every brand must calculate before Hot Sale

Working with a single demand scenario is one of the most frequent mistakes in massive campaigns.Uncertainty is not eliminated, it is managed with ranges.

On your daily base demand, calculate three multipliers:

• Conservative scenario: +10% to +20% on your base. Applies if the advertising investment will be moderate, the discount is not aggressive or the SKU has stable demand.
• Likely scenario: +25% to +50%. The most frequent range in Hot Sale for active SKUs with visible discount and reasonable ad spend.
• Aggressive scenario: +60% or more. Applies if there will be a strong ad spend on the marketplace, a discount above 30% or a history of strong takeoffs in previous campaigns.

Example with sunscreen (base: 26 units daily, 9 days of campaign): Conservative: 26 × 1.15 × 9 =269 units. Likely: 26 × 1.35 × 9 = 316 units. Aggressive: 26 × 1.60 × 9 = 374 units.

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4 Current inventory challenges in ecommerce during massive campaigns in Mexico

Hot Sale amplifies problems that already exist in the operation.It does not create new risks: it exposes those that were there.

1. Stockout in the most visible SKUs

The stockout in the first days of the campaign is the most costly because it occurs when the campaign is active and traffic is maximum.An unsold unit on day 1 of Hot Sale costs more than an unsold unit on any given Tuesday, because it carries active ad spend, opportunity and reputation behind it.

2. Post-campaign overstock that destroys cash flow

Overstock does not always appear at the beginning. Many times it appears due to continuing to purchase during the campaign without checking the real sell-through, which directly increases the operating costsof the business.

3. Poor synchronization between channels

If you sell on multiple channels without real-time synchronization, you can sell the same unit twice, generate cancellations and pay penalties in the marketplace.Centralized inventory with real-time updating It is not a luxury in Hot Sale: it is a basic operating condition.

4. Picking and packing capacity that does not scale at the same rate as orders

Having sufficient inventory does not guarantee being able to ship it. If the warehouse does not have the packing capacity to absorb the peak, orders accumulate and the customer begins to cancel.Estimating inventory without estimating operating capacity is half-hearted planning.

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How Cubbo can help you with inventory estimation and management in Hot Sale

Cubbo is not just a storage provider. It is a technological fulfillment platform designed specifically so that ecommerce brands in Mexico can scale during massive campaigns without compromising the base operation or the margin, overcoming the limitations of the traditional logistics.

Furthermore, understanding the trends shaping 3PLshelps you anticipate improvements in efficiency, automation and visibility that will be key to competing in high-demand campaigns such as Hot Sale.

• Real-time inventory visibility from a single dashboard: See at all times how many units you have available per SKU, per channel and per fulfillment center.
• Native integrations with all major channels: Shopify, Mercado Libre, Amazon, VTEX, WooCommerce and TikTok Shop with bidirectional synchronization. Each sale automatically discounts the stock available in all other channels.
• 99.5% precision in order preparation even in peaks: Fewer returns, fewer issues, and less damage to reviews on the days where it matters most.
• Re-entry of returns on the same day: Returned products are received, inspected, and returned to available inventory the same day.
• Deliveries same-day in CDMX and 1.3 days national average with operation 365 days a year including weekends.
• Dedicated account manager who knows your SKUs, your seasonality, your campaigns and your business rules.

Do you want to prepare your inventory for Hot Sale with real-time visibility and a 3PL that scales with you?

Frequently Asked Questions (FAQs)

When should I start planning my inventory for Hot Sale?

The ideal is to start 6 to 8 weeks before the campaign. This gives you time to calculate the base demand, confirm capacity with suppliers, close purchases of star SKUs and position inventory in the fulfillment centers that best cover your demand by region.

How do I calculate how many units I need for Hot Sale?

The starting point is thedaily base demand for SKU, calculated with recent history, history of the previous event and current trend. On that basis, build three scenarios: conservative (+10-20%), likely (+25-50%) and aggressive (+60% or more). Your purchase must fall within that band, with the minimum assured and the maximum justified.

What is safety stock and how do I calculate it?

Safety stock is the cushion that protects you against unexpected accelerations in demand or supplier delays. It is calculated with the formula:(expected maximum daily sale × maximum replenishment time) − (average daily sale × average replenishment time). In Hot Sale, always use thestressed lead time of the supplier, not the ideal.

How do I avoid overstock after Hot Sale?

The key is in two things:do not continue reordering when sell-through falls below a defined threshold and review the sales pace daily from the first day of the campaign. If the actual pace is lower than the projected one, stop purchases even if there are still active campaign days.

Why is it important to separate inventory by channel?

Because marketplace, own store and B2B have very different demand behaviors in campaign. Allocating inventory uniformly generates overstock in slow channels and shortages in fast channels. The allocation should reflect the historical share of each channel, adjusted for the advertising investment you plan on each.

What happens if I run out of stock halfway through Hot Sale?

A stockout in the middle of the campaign has three simultaneous costs:lost sales with active ad spend, deterioration of positioning in the marketplace and loss of reviews from customers who were unable to complete their purchase. The best response is preventive: review coverage daily and pause advertising in the SKUs that are at risk before they run out.

How does a 3PL like Cubbo help me better manage inventory in Hot Sale?

A 3PL like Cubbo gives youreal-time visibility of stock by channel, native integrations with all your sales channels, 99.5% accuracy in order preparation and same-day returns re-entry. That allows you to make inventory decisions with real data, not late estimates, and keep the delivery promise even on the days of greatest operational pressure.

Hot Sale 2026 starts on May 25. Is your operation ready to scale?

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