Intermediate Quick Answer
What is the lookback period for a sales tax VDA?
⚡ TL;DR
Most state VDA programs cap the lookback at 3–4 years, regardless of how long the seller actually had nexus. A state-initiated audit can reach 6–7 years or more for non-filers. The lookback is a ceiling, not a floor — if you only gained nexus 18 months ago, you owe 18 months, not the full 3–4 year window.
VDA lookback is typically 3-4 years, significantly shorter than the 6-7 year window a state-initiated audit could reach.
Key takeaways
- Standard VDA lookback: most states agree to a 3-year lookback (sometimes 3-4 years) from the date the VDA is initiated; varies by state
- Comparison to audit lookback: states can typically audit 3-7 years from the return due date; some states have unlimited lookback for non-filers (sellers who never registered) — a VDA converts this unlimited exposure into a defined period
- Shorter exposure = shorter lookback: if the seller only gained nexus 18 months ago, the VDA covers 18 months, not the full 3-year ceiling
- Economic nexus timing matters: because economic nexus wasn’t required until post-Wayfair (generally 2018-2019 per state), VDAs initiated now may have a natural lookback cap tied to when the state’s economic nexus law took effect, sellers can’t owe sales tax for periods before they legally had nexus
- Some states negotiate lookback: particularly for sellers who self-disclose proactively and have no prior compliance history with the state, some states will agree to a 2-year lookback rather than the standard 3
- Interest still applies: even for the limited lookback period, interest on unpaid tax accrues from when the tax was originally due; the VDA typically only waives penalties, not interest
Frequently asked questions
How many years back does a VDA cover?
Most state VDA programs limit the lookback period to 3-4 years of prior tax periods, regardless of how long the seller actually had nexus without filing. This is one of the main financial benefits of a VDA: the state agrees not to pursue tax for years before the lookback period even if the seller had nexus longer. A state-initiated audit could reach back 6-7 years or more.
What if I've only had nexus for 1-2 years, does the VDA still cover 3-4 years?
The VDA covers only periods where liability actually existed. If a seller first crossed a state's economic nexus threshold 18 months ago, the VDA covers 18 months, not the full 3-4 year lookback. The lookback period is a ceiling on state exposure, not a floor on what the seller owes.
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