Many growing businesses discover too late that they crossed a state’s nexus threshold years ago and never collected sales tax. Waiting for an audit or a nexus questionnaire is the most expensive way to resolve that. A sales tax voluntary disclosure agreement (VDA) lets you come forward first, usually in exchange for a shorter lookback period and waived penalties. This guide explains how VDAs work, when they make sense, and what the numbers look like.
Key takeaways
- A VDA is a contract with a state: you register, file past returns and pay back tax plus interest, and the state limits the lookback period and waives penalties.
- You generally qualify only if the state has not contacted you about that tax.
- The Multistate Tax Commission runs a free program that keeps your identity confidential until you sign with each state.
- Tax you actually collected from customers but never remitted is usually not protected by a limited lookback.
What a Voluntary Disclosure Agreement Covers
In a typical sales tax VDA, the business agrees to:
- Register for a sales tax permit and start collecting going forward.
- File returns for every period in the lookback window.
- Pay the tax due for those periods, plus interest.
In return, the state agrees not to assess tax for periods before the lookback window and to waive penalties for the covered periods. Lookback periods are set by each state and commonly run three to four years. Interest is generally still due unless the state expressly waives it.
Who Qualifies?
- No prior contact. Under the Multistate Tax Commission program, contact includes filing returns, paying the tax, or receiving a state inquiry about that tax type. States running their own programs use similar rules.
- Not already registered for the tax you are disclosing.
- Not under audit or investigation for that tax.
- Meaningful liability. The MTC program requires more than $500 in tax.
Once a state sends a nexus letter, most of the benefit is gone. That is why timing matters more than anything else.
State VDA vs Multistate VDA
| Feature | Direct state VDA | MTC Multistate Voluntary Disclosure Program |
|---|---|---|
| Where to apply | Each state revenue department | One online application through the MTC National Nexus Program |
| Anonymity | Usually through a representative until terms are agreed | Identified only by case number until you sign each state’s agreement |
| Taxes covered | Varies by state | Sales/use and income/franchise taxes, including Hawaii GET and Washington B&O tax |
| Cost | No state fee; professional fees vary | No charge to taxpayers |
| Best for | One or two states, or states outside the MTC program | Several participating states at once |
Worked Example: Coming Forward vs Getting Caught
Suppose an online seller had $80,000 of taxable sales a year into a state with a 6% average combined rate and never collected. Five years have passed since it crossed the threshold. Using a three-year lookback for illustration:
Tax per year: $80,000 × 6% = $4,800
Without a VDA (audit covers all 5 years): $4,800 × 5 = $24,000 tax, plus interest and penalties for failure to file and pay
With a VDA (3-year lookback): $4,800 × 3 = $14,400 tax, plus interest, with penalties waived
Actual results depend on the state’s lookback, interest rate and penalty rules. Estimate uncollected tax with the Sales Tax Calculator, and see penalties for not collecting sales tax for what is at stake without an agreement.
How the VDA Process Works
- Quantify exposure. Rebuild sales by state and year, separating marketplace sales that a facilitator already taxed. Our marketplace facilitator guide explains which sales are already covered.
- Collect exemption certificates. Valid resale and exemption certificates from past customers reduce the taxable base.
- Submit anonymously. Apply through a representative or the MTC program, describing the business and estimated liability.
- Review the draft agreement. The state accepts, counters or rejects. Check the lookback start date and interest terms.
- Sign, register and file. After signing, you register, file the back returns and pay within the agreed deadline.
- Stay compliant. Collect and file on time from now on. Use our sales tax compliance checklist and multi-state registration guide.
Alternatives to a VDA
- Amnesty programs: occasional, time-limited programs that may waive penalties and sometimes part of the interest.
- Targeted penalty relief: Washington, for example, runs a temporary penalty relief program for retail sales tax left unpaid while businesses adjusted to the services newly taxed under ESSB 5814. See our digital services sales tax rules for context.
- Simply registering: if your exposure is small or very recent, registering and filing from now on may be enough, but you lose anonymity and any lookback protection.
Common VDA Mistakes
- Registering online before negotiating, which counts as contact and can disqualify you.
- Forgetting that tax collected but not remitted is usually owed in full regardless of the lookback.
- Ignoring related taxes, such as state income or franchise tax, that the same nexus may trigger.
- Missing the payment deadline in the signed agreement, which can void its protections.
Conclusion
A sales tax voluntary disclosure agreement turns open-ended exposure into a defined, usually smaller bill without penalties. The key is acting before a state contacts you. Confirm where you have nexus, compare your history with the 2026 economic nexus thresholds, and talk to a qualified tax professional before you file anything. Look up historical and current local rates on our state sales tax pages and the Tax Rate Center homepage.
Frequently Asked Questions
What is a sales tax voluntary disclosure agreement?
It is an agreement in which a business that owes past sales tax registers, files back returns and pays tax plus interest, and the state limits the lookback period and waives penalties.
How far back does a sales tax VDA go?
Each state sets its own lookback, commonly three to four years. Tax actually collected from customers but not remitted is usually owed for all periods.
Can I file a VDA anonymously?
Yes. Representatives can negotiate without naming you, and the Multistate Tax Commission program identifies applicants only by case number until they sign each state’s agreement.
Does a VDA waive interest?
Usually not. Penalties are typically waived, but interest on the unpaid tax is generally due unless the state expressly waives it.
Can I still use a VDA after a state contacts me?
Generally no. Prior contact about the tax, including a nexus questionnaire, filing a return or an audit, usually disqualifies you for that tax type.