Guides
Sales tax bookkeeping for US bookkeepers: overview
Sales tax bookkeeping for US bookkeepers covers nexus, state registration, filing frequency, sales tax payable, and reconciliation under state-specific rules.
What to take away
- Sales tax is state by state45 states and the District of Columbia impose it, while Alaska, Delaware, Montana, New Hampshire and Oregon have no statewide sales tax.
- Sales tax bookkeeping for US bookkeepers means tracking physical presence and state-specific economic nexus thresholds; $100,000 or 200 transactions are common tests, but rules vary.
- Local and marketplace facilitator rules can change who collects tax, but the seller still reconciles sales tax payable against each state return.
- Filing frequency is assigned by each state and often moves to monthly as tax liability grows.
- Skipping a return can lead to permit revocation and personal liability for a responsible person.
Who has jurisdiction over sales tax
State revenue departments have first jurisdiction. They set the base, exemptions and forms. Municipalities add local rates in states such as Colorado and Louisiana, and some Alaska boroughs collect their own tax. Private marketplace facilitators such as Amazon and Etsy can collect on a seller's behalf, but the seller still answers to the state. Bookkeeping firm compliance turns on tracking these layers because a state penalty can arrive months after the missed return.
A seller has physical nexus from an office, warehouse, inventory or employees in a state. Economic nexus follows the U.S. Supreme Court's decision in South Dakota v. Wayfair, Inc., but each state's law sets its own threshold. Some states use a sales threshold, a transaction-count test or both, and the rules and measurement periods vary. California and Texas use a $500,000 remote seller threshold, while New York uses a $500,000 threshold with a transaction test. Check each state's rules for registration timing after a threshold is met.
What to submit and how long approval takes
A standard permit application needs the business FEIN, legal name, ownership details, NAICS code and an estimate of monthly taxable sales. States may also ask for a responsible person's Social Security number. Approval turnaround varies. Some states post a permit within a week; others take up to a month. Apply through the relevant state's revenue or taxation agency, and use its official website to confirm the current application or portal because requirements vary by state.
What to file by state
| State | Authority | Primary return | Typical frequency |
|---|---|---|---|
| California | CDTFA | CDTFA-401-A | Monthly, quarterly or annual by liability |
| Texas | Comptroller | Form 01-117 | Monthly, quarterly or yearly |
| New York | Dept. of Taxation and Finance | Form ST-100 | Quarterly or part-quarterly monthly |
| Florida | Dept. of Revenue | Form DR-15 | Monthly if tax exceeds $1,000; otherwise quarterly |
| Illinois | Dept. of Revenue | Form ST-1 | Monthly, quarterly or annual |
| Pennsylvania | Dept. of Revenue | PA-3 | Monthly, quarterly or semiannual |
| Washington | Dept. of Revenue | Combined excise tax return | Monthly or quarterly |
No single federal form covers sales tax. Each state has its own return and due date, based on the filing frequency assigned by that state. Many states use the 20th day after the period ends, but California uses the last day of the month and Washington has a state-specific due date. Confirm the exact date in the state tax account or filing notice instead of relying on a general convention. Bookkeeper Reconciliation Checklist items should include saved confirmation numbers after each filing.
A filing sequence for bookkeepers
- Determine nexus for each client by physical presence, economic sales and marketplace facilitator rules.
- Register with the state revenue agency before the first taxable sale in a new state.
- Record the assigned filing frequency in a master calendar with state-specific due days.
- Prepare the state return from collected tax, exempt sales and adjustments.
- File and remit by the due date, then reconcile the sales tax payable account to the state return.
Keep filed returns and payment confirmations for the period required by each state. State sales tax record-retention rules vary, so IRS recordkeeping guidance is not a substitute for checking state requirements. States often rely on those records during an audit. Bookkeeping firm SOPs should include a weekly check of the sales tax payable balance against pending due dates.
Sales Tax Filing Sequence
- Determine nexus for each client
- Register with state revenue agency
- Record filing frequency in master calendar
- Prepare state return from collected tax
- File, remit, and reconcile sales tax payable
Reconciling sales tax payable by state
Sales tax collected is not revenue. It sits in a liability account until the state is paid. At month-end, compare the balance in sales tax payable with the tax collected on invoices. Differences often come from exempt sales, returns or local tax rates posted to the wrong state. Reconcile each state separately because a credit in one state cannot offset a liability in another.
What happens if you skip a filing
A missed sales tax return can produce a penalty even when no tax is due. California can revoke a seller's permit after repeated late filings, which makes continued taxable sales unlawful.
Sales tax is a trust fund tax in most states, so money collected from customers belongs to the state from the moment of sale. A responsible person, including a bookkeeper who signs or controls returns, can face personal liability for unpaid tax. A workable bookkeeping firm plan should mark which states carry responsible person liability before a filing gap expands.
