Quarterly excise filings, run for you.
Plain Dot prepares and files Form 720 every quarter — fuel taxes, indoor tanning, sport fishing, communications, air transportation, environmental taxes. The form most software won't touch, handled for you.
Three penalties, stacked every month it sits.
Failure-to-file, failure-to-pay, and interest. They compound monthly until the return is filed and the balance cleared.
Most software won't touch 720, so businesses file late or pay a specialty firm thousands a quarter. We do it for a flat rate.
Get your custom quote40+ excise categories on one return.
Petroleum, oil spill, ozone-depleting chemicals.
Domestic and international communications, air transportation of persons and property.
Gasoline, diesel, kerosene, alternative fuels, fuel blends.
Tires, sport fishing equipment, archery, vaccines.
Heavy trucks and trailers, foreign insurance.
Indoor tanning, sport fishing equipment, certain medical devices.
Two ways to file. One filed return.
Hand us the data and we'll do the whole thing, or import and review the computed liability yourself. Same engine either way.
Send us your data. We do the rest.
Hand off your usage and sales data — fuel inventory, sales records, accounting export. We categorize, calculate, and file. Built for teams without a dedicated tax person.
- Categorization to the right IRS schedule
- Liability computation
- Schedule C credits and adjustments handled
- Quarterly filing with acknowledgment tracking
Import via API or CSV. Review and submit.
Pull data via API or CSV. Review the computed liability by schedule. Submit on your timeline. Built for teams with tax expertise who want the software, not the service.
- API or CSV ingestion
- Computed liability by schedule, line-by-line
- Review, edit, and submit on your schedule
- Same audit trail as concierge filings
Built for the businesses Form 720 applies to.
Heavy vehicle use tax, mapped by jurisdiction.
Fuel taxes computed and filed by state and federal schedule.
Gasoline, diesel, alternative fuel at scale.
Category-level reporting across high-volume sales.
Tire, sporting goods, vaccine excise.
Manufacturer excise computed and filed quarterly.
Communications excise, domestic and international.
Service-level reporting across customer segments.
Air transportation tax on persons and property.
Passenger and freight liability calculated by route.
Foreign insurance excise.
Premium tax on policies issued by foreign insurers.
Indoor tanning excise, multi-location.
10% excise computed across every location, filed in one return.
From data to filed return in 48 hours.
Pull from accounting, fuel, or sales.
Pull from accounting, fuel inventory, sales records, or upload directly. We accept CSV, API, and direct integrations.
Each line mapped to the right schedule.
Each line of activity gets mapped to the right IRS schedule. We show our work — every mapping is auditable.
Computation by category.
No probabilistic guesses on a tax filing. Every category computed by the rule, not a model.
Quarterly submission with schedules attached.
Quarterly submission with schedule attachments. Acknowledgment tracking and correction handling included.
Built so you never miss a quarter.
Submissions queue through IRS outages. Retries are idempotent. Schedule C credits and adjustments carry across quarters automatically. Reminders go out ahead of every deadline so nothing slips.
- Outage-resilient submissionsFilings queued during IRS downtime — never miss a quarter.
- Idempotent retriesNetwork blips never produce a duplicate filing.
- Schedule C credits trackedCredits and adjustments carry across quarters automatically.
- Quarterly remindersAhead of every deadline, per category, per entity.
A clean API for filing 720.
REST endpoints, idempotent by default, sandbox included. Available as an MCP server for agents and internal tools — see API Rails.
const filing = await api.create720({
quarter: "Q2-2026",
payer: { ein: "12-3456789", name: "Acme Trucking" },
schedule: "A",
items: [
{ category: "fuel_diesel", gallons: 125000 },
{ category: "heavy_truck_use", units: 42 }
]
});
// Webhook payload when the filing is accepted:
// { status: "FILED", quarter: "Q2-2026", ackId: "..." }Pay per quarter. Every plan is concierge.
The human-in-the-loop review is included — not a separate line item. No per-form upcharges, no Schedule C surprise fees.
Single category, one entity, concierge filing.
- One excise category
- One legal entity
- Concierge prep & filing
- Email support
All applicable categories. Schedule C credits handled.
- All excise categories
- Schedule C credits & adjustments
- Concierge prep & filing
- Priority support
Multi-entity, multi-category, dedicated support.
- Multi-entity filings
- All excise categories
- Dedicated support
- API or CSV import
Unlimited entities, SLA-backed, private cloud option.
- Unlimited entities
- SLA-backed delivery
- SSO + audit log
- Private cloud option
On time, every quarter, for a fraction of the price.
"We hadn't filed 720 on time in three years. First quarter with Plain Dot, on time and reconciled."
"They caught credits our previous tax person missed."
"We paid a specialty firm thousands per quarter. Now we pay a flat rate."
Stop paying a specialty firm to do what we do for a fraction of the price.
Book a demo. We'll scope your categories, entities, and quarters in one call.