Cloudflare Billing Analysis and Cost Optimization Guide: Find and Disable High-Cost Items

Cost visibility is essential for sustainable cloud operations. This guide breaks down Cloudflare invoice IN-56377961 and shows exactly how to stop the highest billing item.

1. Invoice Overview

Billing period: December 30, 2025 to January 29, 2026.

• Invoice ID: IN-56377961
• Issue date: January 30, 2026
• Total: $4.88 USD
• Due date: January 31, 2026

2. Cost Breakdown

Key finding: about 92% of this bill came from Cache Reserve Writes.

3. Why Cache Reserve Can Become Expensive

Cache Reserve stores cache objects in persistent storage to reduce origin fetches when edge cache misses occur.

You are billed for:

• Writes into Reserve
• Reads from Reserve
• Stored data volume

In this case, write operations dominated the bill.

4. How to Disable Cache Reserve

Step 1: Open the Site in Dashboard

1. Log in to Cloudflare Dashboard.
2. Select the domain that generated the charges.

Step 2: Go to Cache Reserve

1. Open Caching from the left menu.
2. Click Cache Reserve.

Step 3: Turn It Off

1. Set Cache Reserve to Disabled.
2. Confirm the change.

Step 4 (Optional): Clear Existing Reserve Data

Use Clear Cache Reserve to remove retained objects and avoid small residual storage charges.

5. Recommendation

If your origin bandwidth is cheaper than Reserve write costs, disabling Cache Reserve is often the better option.

Before finalizing, evaluate:

• Origin server bandwidth limits
• Latency impact on uncached requests
• Traffic patterns for static assets

For this invoice, the strongest optimization action is to disable Cache Reserve first, then monitor the next billing cycle.