Sales tax and nexus tracking, built specifically for SaaS.
Stonemark continuously watches revenue by state across your billing platform. The moment a new nexus threshold trips, you get a citation-grade alert — plus the registration paperwork drafted, exemption certificates handled, and a filing-deadline calendar that never quietly ages into a penalty.
$49 / $99 monthly tiers. Built for SaaS founders, controllers, and fractional CFOs.
Per-state retail sales — sorted by distance to threshold.
See which states you've already tripped.
Type in your per-state SaaS revenue. The same 50-state rule table the dashboard runs against will mark every threshold you've crossed — and every one you're about to. Takes about a minute.
Plain-English explainer
Louisiana now withholds SaaS sales tax — what changed and the $100K trigger.
The trip on the monitor above is not a rounding coincidence. Here is the rule behind it — and what founders who wait for a friendly first letter are signing up for.
What changed on July 1, 2025
Louisiana's Department of Revenue activated a sales-tax-withholding mechanism on July 1, 2025 that sits on top of the January 2025 ruling that made subscription software taxable in the state (La. R.S. 47:301(13)(c); LAC 61:III.101). The January ruling established that SaaS sold into Louisiana is retail; the July mechanism is how the state now expects that retail tax to be collected at the source — remitted through the normal filing cadence rather than reconciled after the fact.
What the $100K trigger looks like for SaaS
The threshold is the state's standard economic-nexus line: $100,000 of Louisiana-billed retail sales inside a rolling 12-month window. Once that window crosses, nexus is tripped — not at quarter-close, not at year-end, but the moment the cumulative subscription revenue pushes past the line. If your billing export reads something like $118,712 against a $100,000 ceiling — the exact pattern the monitor above flags — you are already inside the obligation. There is no de minimis and no waiting period for the calendar to flip.
Why founders who ignore it get hit with back-withholding plus interest
The exposure is not a one-time late fee. The Department of Revenue can assess sales tax owed from the original charge date — not from the date a notice happens to land — and interest compounds monthly on the under-withheld balance until the period is closed. Founders who wait for a friendly first letter are the ones paying both the back-tax and the cumulative interest. In this regime, silent exposure is the penalty.
Mirror of the live trip shown above.
- ~$100K of billed Louisiana subs inside a rolling 12-month window
- Economic nexus is tripped the moment that cumulative line is crossed — not at quarter-end, not at year-end
- Register with the Louisiana Department of Revenue inside 30 days of the trip
- File and remit on the standard cadence — or back-withhold on the months you already missed
Silent exposure is the penalty.
Get notified
Get the rule-change digest + your per-state exposure when we ship.
One short email when a U.S. state changes its SaaS nexus or withholding rule — and a heads-up the moment Stonemark goes live. No drip campaign, no marketing sequence; close to one tap.
What Stonemark does
Four levers, one ledger.
Sales-tax compliance for SaaS is not “calculate the rate.” It is watching one stream of revenue against 25 different state rules, catching the moment a crossover actually happens, and handling the paperwork before it piles up.
Live nexus watch, state by state
Continuously reconciles revenue per U.S. state from your billing platform so the moment a threshold trips, you know — not 90 days later when a penalty notice arrives.
Registration drafts, pre-filled
When a new obligation opens, we generate the actual state paperwork, not a checklist. You review, sign, file. The trivia of department-of-revenue URLs stays with us.
B2B exemption certificates
Subscription renewals, mid-cycle upgrades, and enterprise renewals all need signed resale or exemption certificates. We generate the request, collect the signature, store the document.
Filing-deadline reminders
A registration is the start, not the end. Calendar reminders fire ahead of each monthly, quarterly, or annual filing window — and never quietly age into a penalty.
End-to-end
From trigger to resolved in the same week.
- 01
Connect
Read-only sync with Stripe, Chargebee, Maxio, or a CSV export. We pull transaction-level revenue by billing address — never write back.
- 02
Watch
Each U.S. state’s current rule (dollar-only, transaction-only, or both) is reflected in continuous state-by-state revenue totals.
- 03
Alert
The instant you cross a threshold, an alert fires with the exact state, rule citation, and confirmation the trip is real — not a one-off high invoice.
- 04
Resolve
Registration paperwork, exemption-certificate templates, and a deadline calendar are drafted the same day, ready for your review and signature.
Reference
The state rules we maintain.
Stonemark ships with a continuously maintained database of economic-nexus thresholds, registrations, and filing cadences for every U.S. state that applies them to SaaS — with the actual citations, not paraphrases.
| State | Rule | Citation | Effective |
|---|---|---|---|
| Louisiana | $100,000 in retail sales — SUBSCRIPTION SOFTWARE NOW TAXABLE (Jan 2025). Registration required within 30 days of crossing. | La. R.S. 47:301(13)(c); LAC 61:III.101 | Jan 1, 2025 |
| Massachusetts | $100,000 in retail sales (dollar-only). Quarterly filings. Remote-seller certificate required at threshold. | 830 CMR 64H.1.5 | Oct 1, 2019 |
| Texas | $500,000 in retail sales (dollar-only, single 12-mo period). Use tax filings quarterly after registration. | Tex. Tax Code § 3.286 | Oct 1, 2019 |
| California | $500,000 in retail sales (combined with $500K of CA-sourced property per Sec. 6203). Quarterly returns. | CDTFA Pub. 73 | Apr 1, 2019 |
Pricing
Two tiers, in the band your controller already approves.
$49 and $99 monthly — chosen deliberately in the band where the 1,000-customer $× $85-per-month path to roughly $1M ARR lives. See the full purchase funnel →
Solo
SaaS founders doing <$2M ARR with cross-state sales.
- Up to 5 connected billing sources
- All 25 economic-nexus states monitored
- Email alerts at the moment of threshold trip
- Registration paperwork auto-draft
Controller
Multi-state SaaS doing $2M–$20M ARR with B2B and mid-cycle changes.
- Up to 25 connected billing sources
- Fractional-CFO controls: exemption cert requests, renewal reminders
- Filing-deadline calendar with reminders
- Team seats for finance + accounting
Talk to us
Get a read on your per-state exposure in a 30-minute call.
Send us a list of states you sell into and a recent billing export. We will come back with a one-page read on where you stand against the current rules — no obligation.
We reply within one business day.