Dataset
IRS Notice Volume History
CSV4.2 MB260 weeksUpdated March 2024
Five years of weekly IRS notice volume data by type. Track seasonal patterns, identify enforcement spikes, and understand what drives notice volume changes over time.
Notice Types Included
- CP14 — Initial balance due notice
- CP503 — Second reminder notice
- CP504 — Intent to levy notice
- CP2000 — Income discrepancy notice
- LT11 — Final notice of intent to levy
- CP523 — Default on installment agreement
- CP90/CP297 — Final notice before levy
2024 Quarterly Volumes (Sample)
| Notice | Q1 | Q2 | Q3 | Q4 | YoY |
|---|---|---|---|---|---|
| CP14 | 2.1M | 3.4M | 1.8M | 1.2M | +4.2% |
| CP503 | 890K | 1.4M | 720K | 480K | +5.8% |
| CP504 | 420K | 680K | 340K | 220K | +7.1% |
| CP2000 | 310K | 450K | 280K | 190K | +3.4% |
| LT11 | 85K | 140K | 72K | 48K | +9.2% |
What Drives Notice Spikes
Notice volume follows predictable seasonal patterns. Q2 sees the highest volume as returns from tax season are processed. CP504 notices (intent to levy) typically spike 60-90 days after CP14 peaks. Understanding these patterns helps taxpayers anticipate enforcement timelines.
Download Full Dataset
Join the API waitlist for download access