Indiana Sales Tax Amnesty Voluntary Disclosure

Indiana Sales Tax Amnesty 2026: How Businesses Can Resolve Past Sales Tax Exposure Before September 9

If your business has unresolved Indiana sales tax exposure from periods before 2024, an unusually valuable opportunity to address it is about to expire.

Indiana Tax Amnesty 2026 ends September 9, 2026.

For eligible taxpayers, the program allows businesses and individuals to resolve qualifying Indiana tax liabilities by paying the underlying tax while receiving a waiver of the related penalties, interest, and collection fees. The Indiana Department of Revenue (DOR) confirms that the program runs from July 15 through September 9, 2026, and generally applies to eligible liabilities for tax periods ending before January 1, 2024.

For businesses with historical Indiana sales and use tax exposure, the savings can be substantial. More importantly, the amnesty program creates a limited window to address old liabilities before they become more expensive or more complicated.

But there is an important issue businesses should understand before relying solely on Indiana’s online eligibility information:

A business may have historical Indiana tax exposure even when the liability is not already sitting on its Indiana tax account.

That distinction is especially important for companies that began making sales into Indiana before registering for sales tax.

This guide explains how Indiana Sales Tax Amnesty 2026 works, who may qualify, how it relates to voluntary disclosure and unregistered historical exposure, and what businesses should review before the September 9, 2026 deadline.

What Is Indiana Tax Amnesty 2026?

Indiana Tax Amnesty 2026 is a temporary program administered by the Indiana Department of Revenue that allows qualifying taxpayers to resolve certain past-due Indiana state tax liabilities on favorable terms.

The program runs from:

July 15, 2026 through September 9, 2026.

Under the program, eligible taxpayers that successfully resolve their qualifying liabilities can receive a waiver of the associated:

Penalties
Interest
Collection fees

Indiana DOR states that eligible liabilities generally include listed taxes administered by DOR or Motor Carrier Services for tax periods ending before January 1, 2024.

This is not a routine program. Indiana’s previous broad tax amnesty programs occurred in 2005 and 2015, and taxpayers who participated in either of those programs generally cannot participate in Tax Amnesty 2026.

For an eligible business with significant historical tax exposure, eliminating years of accumulated penalties and interest can make the difference between an expensive compliance problem and a manageable resolution.

Does Indiana Tax Amnesty 2026 Cover Sales Tax?

Yes.

Indiana’s 2026 tax amnesty is not limited to individual or corporate income tax. DOR describes the program as covering eligible liabilities for all listed Indiana taxes administered by DOR or Motor Carrier Services for qualifying periods.

That means the program can be particularly relevant for businesses with unresolved Indiana sales and use tax liabilities.

Depending on the taxpayer’s circumstances, other Indiana taxes may also be involved, including income, withholding, corporate, and other DOR-administered tax types.

For many multistate businesses, however, sales tax deserves immediate attention because historical liability can accumulate transaction by transaction and filing period by filing period.

Who Should Review Their Indiana Sales Tax Exposure?

Any company that has conducted business in Indiana should consider reviewing its historical activity before assuming it has no amnesty opportunity.

This is particularly important for businesses that:

Made sales to Indiana customers before registering for Indiana sales tax
Had employees, contractors, inventory, offices, warehouses, or other physical presence in Indiana
Exceeded Indiana’s applicable economic nexus threshold during historical periods
Registered for Indiana sales tax later than they arguably should have
Collected Indiana sales tax but did not remit all amounts collected
Filed Indiana sales tax returns that may have understated taxable sales
Misclassified taxable transactions as exempt
Have missing exemption certificates
Acquired a business with historical Indiana tax exposure
Received Indiana tax notices or assessments
Have unpaid liabilities already appearing in INTIME
Have never registered in Indiana despite significant historical Indiana sales

The key question is not simply:

“Does INTIME show that I owe Indiana sales tax?”

The better question is:

“Did my business have an Indiana sales tax filing or collection obligation during any eligible historical period?”

Those are not necessarily the same thing.

The First Question: Did Your Business Have Indiana Nexus?

Before calculating historical sales tax exposure, a business generally needs to determine whether it had sufficient connection with Indiana to create a sales tax obligation.

That connection is commonly referred to as nexus.

Depending on the period and facts involved, nexus may arise through physical presence, economic activity, or both.

Physical Nexus

Physical nexus can arise from activities such as having:

Employees working in Indiana
An office or other business location in Indiana
Inventory stored in Indiana
Property or equipment in the state
Sales representatives or other personnel conducting activities in Indiana
Certain fulfillment, installation, repair, or service activities in the state

Businesses should not assume they lacked nexus simply because they had no traditional storefront in Indiana.

Economic Nexus

Following the U.S. Supreme Court’s South Dakota v. Wayfair decision, states have been able to impose sales tax collection obligations on certain remote sellers based on economic activity even without traditional physical presence.

For a business reviewing several years of Indiana sales, that means nexus analysis may require examining sales by calendar year and determining when the business crossed the applicable Indiana threshold.

That date matters because it can determine when the business’s registration, collection, and filing obligations began.

Indiana Tax Amnesty and Voluntary Disclosure: What’s the Difference?

Businesses researching historical sales tax problems frequently encounter two concepts:

tax amnesty and voluntary disclosure agreements (VDAs).

They serve related purposes but should not be treated as interchangeable.

A voluntary disclosure process generally allows an eligible taxpayer that has not properly complied with a state’s tax laws to approach the state and attempt to resolve historical exposure under negotiated or established terms.

Tax amnesty, by contrast, is a temporary statutory program offering specified relief for eligible liabilities during a defined period.

Indiana Tax Amnesty 2026 is particularly attractive because successful participation can result in the waiver of penalties, interest, and collection fees associated with eligible liabilities.

The right resolution path therefore depends on facts such as:

Whether the business is already registered
Whether DOR has already contacted the business
Whether liabilities have already been assessed
When nexus began
Which periods remain exposed
Which tax types are involved
Whether the business qualifies for amnesty
Whether liabilities fall inside or outside the amnesty period
Whether another disclosure or compliance procedure may be available

A company should evaluate these questions before blindly filing historical returns or contacting the state, because the procedural posture can affect the options available.

The INTIME Eligibility Tool May Not Tell the Entire Story

Indiana provides an online Tax Amnesty 2026 eligibility tool through INTIME, the state’s taxpayer portal.

DOR explains that taxpayers can use the tool to determine whether they have eligible liabilities. Taxpayers can then log into INTIME or create an account to obtain additional information.

That is useful—but businesses should distinguish between known liabilities associated with an existing state tax account and potential liabilities resulting from historical activity that has not yet been reported or assessed.

Consider this example:

Example: The Late-Registered Remote Seller

Suppose an e-commerce company began making substantial sales to Indiana customers in 2021.

The company did not register for Indiana sales tax until 2024.

Its current INTIME account may provide information about liabilities associated with its registered account and reported periods. But that does not, by itself, answer the underlying compliance question:

Did the company have an Indiana sales tax obligation during 2021, 2022, or 2023 before it registered?

If the answer is yes, there may be historical exposure that requires separate analysis.

This is why an amnesty review should not begin and end with an online account balance.

It should begin with the business’s actual historical Indiana activity.

A Quick Indiana Tax Amnesty Eligibility Checklist

If you’re trying to determine whether your business should investigate Indiana Tax Amnesty 2026, start with these questions:

1. Did your business have Indiana nexus?

Review both physical and economic nexus.

2. Do you have unpaid or potentially unreported Indiana tax for periods ending before January 1, 2024?

Indiana states that qualifying liabilities for periods ending before January 1, 2024 may be eligible for the 2026 program.

3. Did you participate in Indiana’s 2005 or 2015 tax amnesty programs?

Taxpayers who participated in either generally are not eligible for Tax Amnesty 2026.

4. When did you register for Indiana sales tax?

Compare the registration date with the date your nexus may actually have begun.

5. Are all historical periods reflected in INTIME?

Do not automatically assume that the periods visible on your account represent the full extent of potential exposure.

6. Have you already been contacted or audited by Indiana DOR?

An existing assessment does not necessarily eliminate amnesty eligibility. DOR states that tax assessed following a recent audit can still qualify when the taxpayer otherwise meets the program’s requirements.

If several of these questions raise concerns, the September 9 deadline deserves immediate attention.

Why Sales Tax Exposure Can Become Expensive

Sales tax is unusual because businesses generally collect the tax from their customers and remit it to the state.

When a business should have collected tax but did not, the economics can change dramatically.

Imagine a business made $1 million of taxable Indiana sales during historical periods but failed to collect the applicable sales tax from customers.

Years later, the business discovers the problem.

It may no longer be practical—or even possible—to go back to every historical customer and collect the missing tax. The business may therefore have to fund some or all of the tax liability itself.

Then add potential:

Penalties
Interest
Collection costs
Professional fees
Administrative time
Audit risk

The total cost can become much larger than the original tax.

Indiana Tax Amnesty 2026 can significantly change that equation for qualifying liabilities because DOR will waive related penalties, interest, and collection fees when the program’s requirements are successfully completed.

How Much Can Indiana Tax Amnesty Save a Business?

The savings depend on the facts.

Assume, purely for illustration, that a business determines it has $75,000 of eligible historical Indiana tax liability.

Outside an amnesty program, the ultimate amount due could potentially include the underlying tax plus applicable penalties and accumulated interest.

During Tax Amnesty 2026, an eligible taxpayer that successfully completes the program may have the related penalties, interest, and collection fees waived.

The longer a historical liability has existed, the more meaningful that relief may become.

This is why businesses should evaluate the program based on their total historical exposure, rather than simply asking whether they have a small balance currently showing online.

What Happens If You Don’t Participate in Indiana Tax Amnesty 2026?

Doing nothing does not necessarily make historical exposure disappear.

Indiana DOR specifically warns that taxpayers eligible for Tax Amnesty 2026 who choose not to participate may incur additional penalties on eligible periods.

The state’s ordinary penalty structure can also be significant. For example, DOR currently lists a general failure-to-pay penalty of 10% of the unpaid tax liability or $5, whichever is greater, while other filing and compliance failures can carry separate penalties.

For businesses with unreported historical activity, there is also the broader concern that the state could identify the exposure later through an audit, information matching, marketplace data, customer audits, federal or state information sharing, or other enforcement activity.

The practical comparison is therefore not necessarily:

Pay now versus pay nothing.

For a business with genuine historical liability, the comparison may be closer to:

Resolve eligible tax now under temporary amnesty terms versus potentially resolve tax, penalties, interest, and other costs later.

Can Businesses Use a Payment Plan During Indiana Tax Amnesty 2026?

Yes, subject to the program’s requirements.

Indiana allows eligible taxpayers to establish an amnesty payment plan through INTIME or United Collection Bureau during the amnesty period.

For businesses, eligible liabilities must total at least $500 to qualify for an amnesty payment plan. The plan must be established during the amnesty window and completed by June 7, 2027 to obtain the program’s penalty, interest, and collection-fee relief.

That creates an important distinction:

September 9, 2026 is still the deadline to enter the program or establish the qualifying arrangement.

Businesses should not interpret the June 2027 payment-plan deadline as an extension of the September amnesty enrollment window.

What If Your Business Is Already Under Audit?

An audit does not automatically mean the opportunity is gone.

Indiana DOR’s Tax Amnesty 2026 FAQ specifically states that tax assessed because of a recent audit can still be eligible, assuming the taxpayer otherwise qualifies and has not participated in a previous disqualifying amnesty program.

Businesses with pending appeals or protests need to be particularly careful.

DOR states that taxpayers with an appeal or protest already in progress are placed in a hold status and are not subject to the additional penalty merely for declining amnesty while the dispute proceeds. However, choosing to pay the protested liability through amnesty means waiving the right to appeal or protest that liability.

That decision should therefore be evaluated carefully rather than treated as a routine payment decision.

What Happens to Indiana Tax Liens Under Amnesty?

There is another potential benefit for taxpayers with existing collection activity.

Indiana DOR states that after amnesty-eligible liabilities are paid in full, related liens will be released.

Eligible taxpayers may also have options concerning tax warrant expungement after resolving qualifying liabilities, subject to Indiana’s separate requirements and deadlines.

For businesses dealing with historical collection problems, these issues can be just as important as the reduction in the amount ultimately paid.

How Businesses Should Prepare Before the September 9 Deadline

The biggest mistake may be waiting until the final days of the program to begin determining whether exposure exists.

A proper sales tax review can require gathering and analyzing several years of transaction data.

Step 1: Gather Indiana Sales Data

Pull Indiana sales by month or year for the relevant historical periods.

Depending on your business model, useful data may include:

Invoice date
Customer location
Ship-to address
Gross sale amount
Taxable amount
Sales tax collected
Product or service category
Exemption status
Marketplace sales
Direct sales

Step 2: Identify Physical Presence

Determine whether the company had employees, inventory, property, offices, contractors, or other activities in Indiana.

Step 3: Analyze Economic Nexus

Review annual Indiana sales and determine whether and when the company crossed the applicable nexus threshold.

Step 4: Determine Taxability

Nexus alone does not determine the amount owed.

The business must also determine whether its products or services were actually taxable under Indiana law.

Step 5: Review Exemptions

Some sales may be exempt based on the transaction or purchaser.

Documentation matters. A transaction believed to be exempt may create exposure if the business cannot substantiate the exemption.

Step 6: Compare Nexus Date to Registration Date

This is one of the most important steps for a late-registered business.

If nexus began before registration, quantify the gap.

Step 7: Review INTIME

Check known liabilities and amnesty information in Indiana’s online system—but do not necessarily treat the online balance as a complete historical nexus analysis.

Step 8: Evaluate the Best Resolution Method

Depending on the facts, determine how the historical liability should be addressed and whether amnesty, voluntary disclosure, historical filings, or another compliance process is appropriate.

Step 9: Act Before September 9

Indiana’s current amnesty window closes September 9, 2026.

Do not leave the analysis until the deadline itself.

Common Indiana Sales Tax Amnesty Mistakes

Mistake #1: Assuming “No Notice” Means “No Liability”

A company can have a tax obligation before the state sends a notice.

DOR also expressly says that a taxpayer who did not receive an amnesty eligibility letter may still qualify for Tax Amnesty 2026.

Mistake #2: Looking Only at INTIME

INTIME is important, but your business records are necessary to determine whether historical activity predates registration or reporting.

Mistake #3: Reviewing Only Physical Nexus

Remote sellers should also consider historical economic nexus.

Mistake #4: Reviewing Sales Without Taxability

Gross Indiana revenue does not automatically equal taxable Indiana sales. Proper exposure analysis should distinguish taxable, exempt, marketplace-facilitated, and otherwise non-taxable transactions where applicable.

Mistake #5: Waiting Until September

Historical sales tax analysis can require substantial data cleanup, nexus analysis, taxability review, return preparation, and coordination with the state.

Mistake #6: Assuming a Payment Plan Can Be Started After Amnesty Ends

Indiana requires an amnesty payment plan to be established during the July 15 through September 9 amnesty period.

Mistake #7: Paying a Disputed Assessment Without Considering Appeal Rights

DOR states that paying a protested liability through amnesty waives the right to appeal or protest that liability.

Indiana Tax Amnesty 2026 FAQ

When does Indiana Tax Amnesty 2026 end?

The program ends September 9, 2026. It began July 15, 2026.

What tax periods qualify for Indiana Tax Amnesty 2026?

Indiana DOR states that eligible liabilities generally include listed taxes for tax periods ending before January 1, 2024.

Does Indiana Tax Amnesty 2026 include sales tax?

Yes. The program covers eligible liabilities for listed Indiana taxes administered by DOR or Motor Carrier Services, which includes Indiana sales tax.

Are penalties waived during Indiana Tax Amnesty 2026?

For taxpayers who successfully complete amnesty, DOR states that related penalties, interest, and collection fees will be waived.

Can a business qualify if it never received an amnesty letter?

Potentially, yes. DOR expressly states that taxpayers may still be eligible even if they did not receive a letter announcing eligibility.

Can a business participate if Indiana recently audited it?

Potentially, yes. DOR states that a liability assessed following a recent audit can still qualify if the taxpayer otherwise satisfies the program’s eligibility requirements.

Can I use a payment plan?

Yes. Businesses generally need at least $500 in eligible liabilities to qualify for an amnesty payment plan, and the plan must be completed by June 7, 2027.

Can I participate if I used Indiana’s previous tax amnesty?

Generally no. Taxpayers who participated in Indiana’s 2005 or 2015 amnesty programs are not eligible for Tax Amnesty 2026.

What if my business registered for Indiana sales tax after 2023?

Registration date alone does not establish when your underlying sales tax obligation began. A business with pre-registration Indiana activity should review when nexus arose and whether taxable transactions occurred before registration.

What if INTIME doesn’t show my older sales tax exposure?

An online account should not replace an independent historical nexus and taxability analysis. If your business had Indiana activity before it registered or filed returns, review those periods separately to determine whether an obligation existed.

Why Businesses Should Review Indiana Exposure Now

The September 9 deadline creates a narrow decision window.

For businesses already aware of an Indiana liability, the potential benefit is straightforward: qualifying taxpayers can pay eligible tax while obtaining relief from related penalties, interest, and collection fees.

For businesses that aren’t sure whether they owe, the opportunity may be even more important.

A historical nexus review may uncover exposure from periods before the business registered in Indiana. Finding that exposure while an amnesty program remains open can provide options that may not exist after September 9.

Indiana has not routinely offered broad tax amnesty. The prior programs were in 2005 and 2015. The current program is temporary, and DOR has established a firm September 9, 2026 end date.

Need Help Reviewing Indiana Sales Tax Amnesty or Voluntary Disclosure Options?

If your business made sales into Indiana before 2024, now is the time to determine whether historical exposure exists.

A focused review can help answer:

When did your Indiana nexus begin?

Were your Indiana transactions taxable?

Did you register after your filing obligation had already started?

Are there historical liabilities that do not appear in your current account review?

Does Indiana Tax Amnesty 2026 offer a better resolution path for eligible periods?

Is a voluntary disclosure or another compliance strategy relevant to liabilities outside the amnesty program?

The deadline is September 9, 2026.

With only weeks remaining, businesses with potential Indiana exposure should begin reviewing historical sales, nexus, registration dates, taxability, and filing history now rather than waiting for a notice from the state.

Ansari Firm can help businesses identify historical Indiana sales tax exposure, evaluate amnesty and voluntary disclosure considerations, quantify potential liabilities, and develop a path toward compliance before the deadline.

Contact Ansari Firm to discuss your Indiana sales tax exposure and determine what steps may be available before Indiana Tax Amnesty 2026 closes on September 9.

This article is for general informational purposes only and does not constitute legal or tax advice. Eligibility and the appropriate resolution strategy depend on the taxpayer’s specific facts and circumstances.

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