What is an Insertion Order?
An Insertion Order (IO) is a legally binding document that outlines the agreement between an advertiser (or their agency) and a media publisher or platform. It serves as a purchase order for advertising placements, detailing exactly what ads will run, where they'll appear, how much they'll cost, and when the campaign will run.
Think of an IO as a contract that protects both parties. For advertisers, it confirms they're getting the inventory they paid for. For publishers, it documents the commitment and payment terms.
Key Components of an Insertion Order
A typical IO includes:
Campaign Details - Campaign name and advertiser details - Start and end dates - Total budget and payment terms - Billing information and contacts
Ad Specifications - Ad formats and sizes (e.g., 300x250 banner, 970x90 leaderboard) - Creative requirements and specifications - Number of impressions or clicks guaranteed - Placement locations or site sections
Performance Terms - Impressions, clicks, or conversions to be delivered - Viewability requirements (if applicable) - Fill rates and trafficking timelines - Ad serving and tracking details
Commercial Terms - Cost per impression (CPM), cost per click (CPC), or flat fee - Payment schedule and invoicing details - Cancellation policies and penalties - Any discounts or rate cards applied
Why Insertion Orders Matter
IOs are fundamental to professional media buying for several reasons:
Legal Protection: Both advertisers and publishers have documented proof of what was agreed upon, reducing disputes over delivery, pricing, or timelines.
Inventory Control: Publishers can manage their available ad space more effectively, preventing overselling and ensuring promised placements are available.
Campaign Accuracy: By specifying exact placements, formats, and targeting, IOs ensure campaigns run as intended rather than in unintended locations.
Financial Clarity: Clear pricing, payment terms, and billing addresses prevent misunderstandings about costs and payment due dates.
Performance Accountability: With guaranteed impressions or specific performance metrics documented, both parties know what success looks like.
Insertion Orders in Different Channels
Traditional Media IOs typically cover print, radio, or outdoor advertising with fixed dates and placements.
Programmatic IOs are used when buying display ads through automated platforms. These might guarantee impressions across multiple sites or audience segments.
Direct Inventory IOs are negotiated directly between agencies and publishers for premium placements on specific sites.
Video IOs specify video ad formats, placement (pre-roll, mid-roll, post-roll), and duration alongside standard terms.
Practical Example
Imagine your agency wants to run a display campaign for an e-commerce client. You might create an IO with:
- Campaign: Q1 Brand Awareness Campaign
- Duration: January 1–March 31
- Budget: £15,000
- Placements: Homepage and product category pages across 50 premium websites
- Format: 300x250 medium rectangles and 728x90 leaderboards
- Guarantee: 2 million impressions
- Rate: £7.50 CPM
- Payment: Net 30 days from invoice
Once signed by both parties, this IO becomes the contract governing your campaign.
Best Practices When Creating IOs
Be Specific: Vague placements or formats lead to confusion. Use detailed descriptions and reference standard IAB guidelines.
Clarify Terms: Define what happens if guaranteed impressions aren't delivered. What's the remedy – a makegoods (free impressions) or refund?
Document Creative Details: Attach or reference creative files, sizes, and any special requirements.
Include Contact Information: Ensure both parties have clear points of contact for trafficking, reporting, and disputes.
Review Payment Terms: Confirm invoice dates, payment deadlines, and any early payment discounts.
Insertion Order vs. Rate Card
A rate card is a publisher's pricing menu showing what placements cost. An IO is the actual agreement for a specific campaign using (typically) rates from that card, customized for your needs.
Common Challenges
In practice, IOs can be challenging because:
- Negotiation cycles between agencies and publishers can be lengthy
- Programmatic complexity makes traditional IOs harder to apply to automated buying
- Amendments during campaigns require new signed versions, adding administrative overhead
- Non-delivery issues occasionally arise, requiring makegoods or disputes
Despite these challenges, IOs remain essential for professional media buying, ensuring campaigns are properly scoped and both parties understand their obligations.