Margin-Based Bidding: How to Bid Differently for Different Products

Here's a simple truth that changes everything: a click on a high-margin product is worth more than a click on a low-margin product. Yet we see most advertisers bid the same for both.

Margin-based bidding corrects this by adjusting what you're willing to pay based on how much you'll make. We consider it the foundation of profit-optimized advertising.

The Logic of Margin-Based Bidding

Why Uniform Bids Fail

Consider two products, both priced at $50:

• Product A: 60% margin = $30 profit
• Product B: 20% margin = $10 profit

If your conversion rate is 5%, each click converts to $1.50 profit for Product A but only $0.50 for Product B.

Bidding $1.00 per click makes Product A profitable and Product B unprofitable. Yet platforms treat them identically unless you tell them otherwise.

The Margin-Based Approach

We recommend setting bids (or bid adjustments) proportional to margin:

• High-margin products: Bid aggressively
• Medium-margin products: Bid moderately
• Low-margin products: Bid conservatively (or exclude)

Implementation Strategies

Strategy 1: Margin-Based Campaign Structure

We recommend creating separate campaigns by margin tier:

• High-margin campaign: 50%+ margin products, target 2x POAS
• Medium-margin campaign: 30-50% margin products, target 1.5x POAS
• Low-margin campaign: <30% margin products, target 1.2x POAS (or exclude)

This allows different budgets and bidding strategies per tier.

Strategy 2: Custom Labels in Shopping

Use custom labels in your product feed to tag margin tiers. Then create product groups based on these labels for bid adjustments.

Strategy 3: Profit-Based Conversion Values

Pass profit as your conversion value instead of revenue. Smart bidding strategies will naturally bid more for high-profit conversions.

We believe this is the most elegant solution, and it's the approach we've built GetPOAS around.

Strategy 4: Manual Bid Modifiers

For manual bidding, calculate appropriate bids based on margin:

Max CPC = Target POAS × Margin × Price × Expected CVR

This ensures you never pay more than a product is worth.

Calculating Your Margin Tiers

Step 1: Export Product Data

Pull product-level data including:

• Product ID
• Price
• COGS
• Other variable costs

Step 2: Calculate True Margin

Margin = (Price - COGS - Variable Costs) / Price

Be thorough with variable costs: shipping, payment fees, packaging, etc.

Step 3: Segment into Tiers

We recommend creating 3-5 tiers based on margin distribution:

• Premium (top 20%)
• High (next 20%)
• Medium (middle 30%)
• Low (next 20%)
• Unprofitable (bottom 10%)

Step 4: Set Tier-Appropriate Targets

Calculate break-even and target POAS for each tier. Higher margins can tolerate higher ad costs.

Advanced Margin Optimization

Dynamic Margin Calculation

Margins aren't static. We recommend accounting for:

• Promotional pricing: Discounts reduce margin
• Shipping thresholds: Free shipping on some orders affects margin
• Seasonal costs: Peak season shipping costs more

Dynamic margin calculation keeps your bidding accurate as conditions change.

Return Rate Adjustment

Some products have higher return rates. A 20% return rate means you only keep 80% of the margin you expected.

Effective Margin = Margin × (1 - Return Rate)

Bundle and Cross-Sell Value

Some products are gateway items that lead to additional purchases. We suggest considering:

• Average order value when this product is purchased
• Likelihood of repeat purchase
• Cross-sell revenue potential

A low-margin product might be worth more if it drives high-margin add-ons.

Common Mistakes in Margin-Based Bidding

Ignoring Variable Costs

Using only COGS ignores shipping, payment fees, and other variable costs. This inflates apparent margins and leads to overbidding.

Static Margin Data

Costs and prices change. Update margin data regularly—monthly at minimum, ideally in real-time.

Over-Complicating Structure

More tiers isn't always better. We recommend starting simple (3 tiers) and adding complexity only if data supports it.

Neglecting Volume

A high-margin product that sells one unit per month might not deserve campaign attention. Balance margin with volume potential.

Measuring Margin-Based Bidding Success

Key Metrics

• POAS by tier: Are you hitting targets for each margin segment?
• Profit contribution by tier: Where is profit actually coming from?
• Spend distribution: Is budget flowing to high-margin products?

Regular Audits

Monthly, review:

• Margin accuracy: Are calculated margins matching actual profit?
• Tier performance: Is each tier meeting its targets?
• Opportunities: Are there high-margin products not getting enough spend?

Conclusion

Margin-based bidding is fundamental to profitable advertising. It aligns your ad spend with your profit potential, ensuring you invest more in products that generate more profit.

The implementation can be as simple as three campaigns by margin tier or as sophisticated as real-time profit-based conversion values. We recommend starting simple, measuring results, and adding complexity as you validate the approach.

We've seen the advertisers who win are those who understand that not all revenue is created equal—and bid accordingly.