Businesses that file Indiana sales tax online must use Form ST-103 through INTIME, the Indiana Taxpayer Information Management Engine. Indiana applies a 7% statewide rate to standard taxable transactions, without general county or city additions on ordinary retail sales. The form is short, although accurate filing still depends on how each business classifies sales, exemptions, marketplace activity, and untaxed purchases. INTIME calculates taxable amounts from figures entered by the filer, making clean source records essential before adding any data to the return. This blog covers how to file sales tax in Indiana, prepare ST-103 data, determine the correct deadline, make payment, and retain evidence of submission. It also explains how managed multistate sales tax compliance reduces recurring work by allowing a single finance team to manage multiple portals and filing calendars.
Alt Text: Galvix experts manage accurate multistate sales tax filings Link: https://www.galvix.com/book-demo?ref=file-indiana-sales-tax-online
H2: What Should You Know Before Filing an Indiana Sales Tax Return? Indiana has a simple statewide rate, which removes many jurisdiction calculations found elsewhere. An Indiana sales tax return still requires the correct filing status, transaction classifications, exemption treatment, and reporting period before submission, as these inputs determine what INTIME calculates. H3: Indiana Uses One Statewide Sales Tax Rate Indiana applies a single state rate to ordinary taxable retail transactions, so sellers do not calculate county or city general additions. Separate local taxes can apply to specific activities, including certain food, beverage, and lodging transactions. State rate: Indiana sales tax is 7% statewide. Local sales taxes: None apply to ordinary retail transactions. Return: ST-103 is the standard Sales and Use Tax Return. Portal: Businesses electronically file and pay through INTIME. This single-state sales tax rate simplifies the arithmetic compared with states that require jurisdiction-by-jurisdiction sales tax rates. Classification is still critical because taxable products, exempt transactions, excluded marketplace sales, and other transaction types receive different treatment. H3: Your ST-103 Due Date Depends on Filing Status Your Indiana sales tax filing deadline depends on the filing status assigned by the Department of Revenue. Businesses cannot choose whichever deadline fits their internal calendar, because the status reflects their established sales tax liability. Filer General Deadline Early filer 20th after the reporting month Standard monthly filer 30th after the reporting month Annual filer January 31 for the January to December period Weekend or holiday Next legal business day
Under Indiana rules, an early filer has average monthly liability exceeding $1,000, while standard monthly filers have average monthly liability below that threshold. The assigned filing frequency can change as liability levels change, and DOR communicates these changes before the next tax year. For additional resources, you should review Galvix's Sales Tax Resources along with the official Indiana Department of Revenue website.
H3: Zero Sales Still Require a Return Holding an active Indiana registration means the business must continue filing during its assigned periods, even when no tax is collected. Indiana calls this a zero return, and missing returns can prevent automatic renewal of a Registered Retail Merchant Certificate. An outstanding tax bill can also affect RRMC status. Businesses should therefore keep both filing and payment records current rather than assuming zero activity removes their continuing tax obligations.
H2: Who Needs to File Indiana Sales Tax? Businesses with an active Indiana registration continue filing according to the status assigned to their account, even when individual transactions are exempt. For teams asking how to file IN sales tax, the first step is confirming nexus and registration status before opening INTIME. H3: Indiana Registered Retail Merchants A business making taxable retail sales in the State of Indiana usually needs to be registered before collecting tax. Indiana issues a Registered Retail Merchant Certificate after the Business Tax Application is processed through InBiz. Taxable sellers: Businesses making taxable Indiana retail transactions. Physical presence: Businesses with an Indiana office, employee, inventory, or qualifying presence. Active certificate: Businesses holding a current RRMC. Zero activity: Registered businesses with no activity during a required period. Businesses often seek an Indiana sales tax permit, though the state issues a Registered Retail Merchant Certificate. Each qualifying business location needs its own retail merchant certificate, which connects that location to the appropriate sales tax account. The sales tax registration process starts through InBiz. Businesses complete the BT-1 registration form with details such as: Legal business name Location information Federal Employer Identification Number Responsible-officer details (or a Social Security Number) After the registration process is complete, the business can manage filing and payment through INTIME. In simple terms, InBiz handles initial registration, while the INTIME account supports ongoing filing, payments, and other sales tax activity.
H3: Remote Sellers and Marketplace Sales Remote sellers establish Indiana economic nexus when gross revenue from sales into Indiana exceeds $100,000 during the current calendar year or previous calendar year. Indiana removed its former 200-transaction threshold effective January 1, 2024. The threshold covers qualifying Indiana sales of tangible personal property, digital products, and delivered services. Indiana also taxes certain digital goods under specific rules, so businesses should review the taxability of their products rather than treating every electronically delivered item the same. Marketplace sales require separate attention. Sales made through a marketplace facilitator that collects Indiana tax do not count toward a remote seller's $100,000 threshold, while current ST-103 instructions define qualifying facilitator-collected transactions as Excluded Sales when already included in Total Sales. Businesses approaching nexus across several channels can use Galvix's sales tax nexus monitoring to consolidate activity before new state obligations become filing problems.
H2: What Data Should You Prepare Before Opening INTIME? Preparing an Indiana sales tax return online starts with reconciling source records before accessing the portal. Clean sales data helps the business separate gross activity, exempt amounts, marketplace exclusions, untaxed purchases, payment details, and the correct tax period before INTIME calculates anything. Prepare Why It Matters Filing period Opens the correct ST-103 Total sales Feeds the first return field Exemptions and deductions Reduces sales subject to Indiana tax Excluded sales Separates third-party collection obligations Use tax Covers applicable untaxed business purchases Collection allowance tier Supports the correct allowance Bank information Supports ACH payment
Businesses that pull transactions from multiple systems can also use Galvix to consolidate transaction records before preparing returns. Supported connections include ecommerce platforms, accounting systems, ERPs, payment processors, API connections, and file uploads. H3: Total Sales Includes More Than Indiana Taxable Sales ST-103 uses total sales differently from the final taxable base. Indiana's instructions state that this field includes retail, wholesale, manufacturing, and out-of-state activity for the specified period, meaning gross sales can be substantially larger than total taxable sales. If your team searches how to fill out sales and use tax return in Indiana, this distinction deserves attention first. Amounts Indiana does not tax must then be handled through the appropriate exemptions, deductions, or Excluded Sales fields rather than omitted without considering ST-103 instructions.
H3: Exemptions and Excluded Sales Are Different Exemptions or deductions cover transactions included in Total Sales that qualify for Indiana tax-free treatment. Excluded Sales cover sales in which another party bears the tax collection obligation, such as qualifying marketplace-facilitated transactions included in Line 1. A marketplace facilitator that collects and remits tax therefore changes the reporting treatment, rather than automatically changing the seller's underlying personal property classifications. Maintaining these categories separately helps the business explain how ST-103 moved from Total Sales to taxable sales.
Alt Text: Indiana sales tax return fields and reconciliation checks
H2: How Do You File Indiana Sales Tax Online Through INTIME? To file Indiana sales tax online, open the appropriate Sales account in INTIME and complete ST-103 for the selected period. This how to file sales tax return in Indiana walkthrough follows an actual August 2026 filing captured inside the live portal.
H3: Step 1: Log In to INTIME Businesses that file Indiana sales tax online begin with INTIME. Enter your registered username and password, select Log in, and confirm that you have reached the correct profile before opening the Sales account. INTIME supports ongoing filing and account management, while initial registration occurs through InBiz.
Alt Text: Indiana sales tax filing begins at INTIME login screen
H3: Step 2: Find Your Sales Account On the Summary screen, locate the Sales panel and check the displayed filing frequency before moving forward. Review the latest ST-103 status as well, because a ‘Processed’ status indicates that the Department received and processed that prior return. Then select View financial summary, returns, and periods to reach the filing history associated with that Sales account.
Alt Text: Indiana sales tax account showing filing frequency and status
H3: Step 3: Review Previous Filing Periods The Financial Summary displays recent periods, along with tax, penalties, interest, payments, credits, balances, and pending payments. This view helps identify a filed return with an unpaid balance before the next filing period begins. Select the period-end date corresponding with the reporting period you plan to file. Watch out: A period displaying zero tax and zero payment does not prove that a zero return was submitted. Check the Returns tab when filing status remains unclear.
Alt Text: Indiana sales tax return history across previous filing periods
H3: Step 4: Open the Correct Period INTIME identifies each tax period by its ending date, so verify the period before choosing to file or amend a return. The same link handles an original ST-103 and an amendment, which makes the next screen important. A new original filing opens blank, whereas an existing return may display previously reported figures. Watch out: Review whether ST-103 opens blank or populated before typing. Existing figures may indicate that you entered an amendment workflow instead of a new return.
Alt Text: Indiana sales tax return period ready for filing
H3: Step 5: Review the ST-103 Fields When you file Indiana sales tax online, the Return Information screen presents Total Sales, Exemptions or Deductions, Excluded Sales, and calculated fields. Editable fields appear separately from amounts that INTIME derives using the return information entered by the filer. Review the full form before typing so each number comes from the correct reconciliation source.
Alt Text: Indiana sales tax return showing blank ST 103 fields
H3: Step 6: Check What Total Sales Includes Select More info beside Total Sales before entering Line 1. INTIME states that this field covers sales activity during the specified period, including retail, wholesale, manufacturing, and out-of-state activity, rather than Indiana taxable revenue alone. The portal recalculates while entries change, so partially completed data can still generate a plausible-looking total tax. Watch out: Do not treat Total Sales as taxable Indiana revenue. Out-of-state and other qualifying amounts must be classified correctly elsewhere on ST-103.
Alt Text: Indiana sales tax return explaining the Total Sales field
H3: Step 7: Enter Sales and Review Calculated Tax Enter Total Sales, Exemptions or Deductions, and Excluded Sales from reconciled records. INTIME subtracts Lines 2 and 3 from Line 1 to calculate taxable sales, then applies Indiana's 7% rate to calculate the sales tax due. Scroll downward and enter any applicable Use Tax on untaxed business purchases consumed rather than resold. The captured filing also shows an editable collection allowance, so verify the applicable tier using liability from the previous year before accepting the displayed amount. Watch out: A calculated tax due can look complete while exemptions or excluded sales remain unfinished, since INTIME recalculates the form as entries change.
Alt Text: Indiana sales tax return with calculated taxable sales
H3: Step 8: Choose How You Want to Pay Businesses researching how to pay sales tax in Indiana will reach ‘Payment Options’ after completing the return. INTIME presents Bank Account, Credit Card, or Pay Later, allowing the filing process and payment timing to follow different paths. If you file Indiana sales tax online before the deadline, review the displayed due date before choosing your payment method. Watch out: Pay Later moves the filing forward without payment during that session. It does not cancel the balance or extend the statutory payment deadline.
Alt Text: Indiana sales tax filing showing INTIME payment options
H3: Step 9: Confirm the Bank Payment Details When paying by bank account, INTIME carries the return balance into the payment screen and requires the Confirm Amount to be re-entered. Review the selected bank account and payment date carefully before continuing with the ACH authorization. In Galvix's captured filing, the payment date defaulted to the current date rather than the later return deadline. Watch out: The default payment date is a portal observation from this captured filing. Check your own date instead of assuming INTIME always schedules payment for the deadline.
Alt Text: Indiana sales tax payment screen confirming bank details
H3: Step 10: Review Submit and Save Confirmation The Confirm Submission screen compares Total Amount Due, Amount Paid, and Amount Owed After Payment before the final declaration. Select ‘Submit’ only after verifying the return, since nothing before that action constitutes a filed ST-103. After submission, save the return confirmation and any separate payment confirmation within the period's compliance records. Watch out: Reaching Confirm Submission does not complete the filing. INTIME must accept the submission and issue a confirmation number before you have filing evidence.
Alt Text: Indiana sales tax filing ready for final INTIME submission
Alt Text: Indiana sales tax filing checks before INTIME submission
H2: How Do Exempt Sales Affect an Indiana Sales Tax Return? Indiana uses Form ST-105 for many exempt purchases, including resale and other qualifying exemptions. Sellers should retain appropriate documentation supporting sales included within Exemptions/Deductions on ST-103. Certificate collection, state registration status, and transaction eligibility should remain separate checks. A completed certificate supports the exemption record, although the document still needs to fit the buyer and transaction. Tool Highlight: Use the sales tax exemption certificate guide when reviewing certificate requirements, documentation, and renewal workflows for Indiana and other states.
H2: What Problems Do Indiana Sellers Face With Sales Tax? Indiana sellers can still run into issues around exemptions, refunds, and return treatment even though ST-103 itself is relatively simple. Most problems start when transaction records and tax treatment do not match. A common concern is sales tax paid on purchases that should have been exempt. In many cases, businesses need to request a refund rather than reduce the tax collected from customers.
Alt Text: Reddit discussion about issues with Indiana sales tax filing (Source) Exemption documentation should therefore be in place before the purchase whenever possible. Keeping the correct certificate with the transaction can reduce refund requests and make it easier to support exempt treatment later.
Alt Text: Reddit discussion about challenges with Indiana tax return processing (Source) INTIME or account-level issues can also require follow-up with the Department. Incorrect exemptions, excluded sales, collection allowance, or payment details may create extra work after filing, especially when the return needs review.
Alt Text: Galvix simplifies recurring sales tax filing across multiple states Link: https://www.galvix.com/book-demo?ref=file-indiana-sales-tax-online
How Does Galvix Help Businesses File Indiana Sales Tax Online?
Galvix helps businesses manage IN sales tax filing through a managed compliance workflow. Instead of asking internal teams to reconcile transaction data, prepare ST-103, track certificates, and manage filing dates separately, Galvix consolidates these tasks into a single accountable process.
For teams that file Indiana sales tax online, Galvix can prepare and reconcile return data, review exemption records, prepare returns for approval, and manage recurring filing schedules. Supported sales tax integrations can also bring transaction data from systems such as Shopify, QuickBooks, and NetSuite into the compliance workflow.
Galvix can connect Indiana filing with nexus monitoring, state registrations, notice management, and exemption certificate management for businesses operating across multiple states.
Pricing is modular, so businesses pay only for the services they use. Exact pricing depends on the volume of work associated with each selected service
What Galvix Manages for You
- Return preparation: Reconciles Indiana transaction data before filing.
- Specialist review: Checks prepared returns before customer approval.
- Exemption management: Connects certificates with reported exempt activity.
- Deadline support: Tracks recurring registered-state filing schedules.
- Notice management: Supports state correspondence after filing.
Book a Galvix demo to review your Indiana workflow and simplify recurring sales tax filing as your business enters additional states.
Frequently Asked Questions
How do I file Indiana sales tax online?
To file Indiana sales tax online, sign in to INTIME, open the correct Sales account, then select the required filing period. Complete ST-103 using reconciled Total Sales, exemptions, Excluded Sales, and applicable use tax, then review payment details and submit. Keep the confirmation number as evidence that Indiana received the filing.
What form is used for an Indiana sales tax return?
Indiana registered retail merchants use Form ST-103 for their standard sales and use tax reporting. The sales tax return captures Total Sales, exemptions or deductions, Excluded Sales, taxable sales, collection allowance, use tax, and the resulting amount due. Businesses submit ST-103 electronically through INTIME.
When is Form ST-103 due in Indiana?
The normal monthly ST-103 deadline is the 30th of the month following the reporting month, while qualifying early filers must file by the 20th. Annual filers have a January 31 deadline for the January-to-December period. When the applicable date falls on a weekend or legal holiday, filing moves to the next business day.
Why are some Indiana returns due on the 20th and others on the 30th?
Indiana determines timing based on the merchant's average monthly liability rather than setting a single deadline for every account. Early filers with liability above the applicable threshold file by the 20th, while standard monthly filers use the 30th. Review INTIME whenever your sales volume changes enough to affect assigned status.
Do I need to file an Indiana zero sales tax return?
Yes. Registered businesses must file the required return even when they have no taxable activity during that period. Missing filings can interfere with RRMC renewal and may result in penalties, so a zero balance should never be treated as proof that the filing requirement has disappeared.
How do I pay sales tax in Indiana?
Indiana businesses can pay electronically through INTIME using bank payment or an accepted debit or credit card. A payment plan may also be available for qualifying outstanding balances. Payment arrangements do not erase interest charges, so businesses should address balances promptly and retain each electronic payment confirmation.
What should be included in Total Sales on ST-103?
ST-103 Total Sales includes the sales activities for the specified period, including retail, wholesale, manufacturing, and out-of-state sales. This field is broader than Indiana taxable revenue, so amounts qualifying for deductions or exclusion must be classified correctly before INTIME calculates taxable sales and the final amount due.
What are Excluded Sales on Indiana ST-103?
Indiana defines Excluded Sales as sales already included in Line 1 where another party holds the legal obligation to collect tax, such as a marketplace facilitator. These amounts differ from exemptions and deductions, even though both reduce the amount ultimately subjected to the Indiana sales tax calculation.
Does Indiana still use a 200-transaction nexus threshold?
No. Indiana eliminated the 200-transaction economic nexus test effective January 1, 2024. Remote sellers now evaluate the $100,000 gross-revenue threshold using qualifying Indiana sales from the current or prior calendar year, with marketplace-facilitated sales excluded from the seller's threshold calculation when the facilitator collects the tax.
How does Galvix help with Indiana sales tax filing?
Galvix helps businesses file Indiana sales tax online within a managed multistate compliance workflow. Its team can reconcile source transactions, prepare returns, support exemptions, monitor nexus, manage registrations, and handle state notices. Businesses approve prepared work while Galvix manages the recurring operational steps across registered jurisdictions.
