Payroll tax that plugs into the system you already run
TaxRails connects to your HCM or payroll platform over API, pulls the tax data from every pay run, and handles the rest — creating the filing, submitting it to the state portal, and remitting the payment from your own accounts. No CSV exports. No portal logins. No swivel-chair reconciliation.
Built as real API integrations
Each one is a production API connection built and maintained by our team — not a data-export workaround. Three are live today, with PeopleSoft close behind.
PrismHR
Multi-EIN, multi-client payroll tax filing and remittance for PEOs, ASOs, and payroll service bureaus running on PrismHR.
View the PrismHR integration → Live Workforce ManagementWorkforce.com
Shift-based and hourly workforces across many states and localities — tax handled automatically off each Workforce.com pay run.
View the Workforce.com integration → Live Enterprise HCMWorkday
Keep Workday as your system of record and move payroll tax filing and deposits onto infrastructure built to execute them.
View the Workday integration → Coming Soon Enterprise HCMOracle PeopleSoft
A modern tax layer on top of PeopleSoft HCM — no upgrade project, no rip-and-replace, no more manual portal filing. In active development — early access open.
View the PeopleSoft integration →Running something else? We build integrations against most modern payroll and HCM APIs — and if you'd rather not wait, build it yourself against our API.
Or build the integration yourself
You don't have to be on a platform we already support. TaxRails is a REST API first and a product second — every endpoint our own integrations run on is available to you. If your system can make an HTTPS request, it can file and remit payroll tax through TaxRails.
The full API surface
No partner tier, no cut-down public endpoints. You get the same REST API our PrismHR, Workforce.com, and Workday integrations are built on.
Push pay runs, pull results
Send wages, withholding, and employer liabilities by jurisdiction as each pay run closes, then read back filings, payment status, and agency confirmations programmatically.
Real-time, not batch
Nothing here depends on a nightly file drop or an SFTP handoff. Calls are synchronous and the state of every filing and deposit is queryable whenever you need it.
Built for many entities
Multi-EIN and multi-client from the start, so platforms filing on behalf of their own customers model that directly instead of working around it.
Sandbox before production
Build and validate against test data first, run a payroll cycle in parallel with your current process, then cut over once the numbers tie out.
Engineers on the other end
API docs, credentials, and a shared channel with the team that maintains the endpoints — not a ticket queue between you and an answer.
Tell us what you're building and we'll send docs and sandbox credentials.
Four steps, then it runs itself
Connect
We authenticate against your platform's API and map your legal entities, EINs, and jurisdiction registrations.
Sync
Every pay run flows into TaxRails automatically — wages, withholding, and employer liabilities by jurisdiction.
File
We generate each return, submit it to the agency or portal, and capture the confirmation as proof of filing.
Remit
Payments go out on the due date by ACH from your own bank accounts — you keep the float until the money is owed.
What every integration covers
Federal deposits and returns
941, 940, and federal tax deposits on your deposit schedule.
State income tax withholding
Every state with a withholding requirement, on each state's own cadence.
State unemployment insurance
Quarterly SUI wage reports and contributions, with per-EIN experience rates applied.
Local and municipal taxes
City, county, school district, and transit taxes — the jurisdictions that break most systems.
Paid leave and disability programs
State paid family leave, temporary disability, and similar statutory programs.
Notices, amendments, and reconciliation
Agency notice handling, amended returns, and year-end reconciliation against your ledger.
Integration questions
The connection itself is already built for supported platforms, so the work is your setup: mapping entities and EINs, confirming jurisdiction registrations, and validating a parallel pay run. Most customers are filing through TaxRails in weeks, not quarters.
No. TaxRails sits alongside your payroll or HCM platform, which stays your system of record for employees, pay, and GL. We take over the tax filing and remittance layer only.
In your accounts. Unlike a traditional tax service that impounds funds days or weeks ahead of the due date, TaxRails initiates payment from your bank on the date the deposit is due. You keep the float and the visibility.
Yes. The TaxRails REST API is the same one our own platform integrations are built on, and it's open to any system that can call it. You get docs, sandbox credentials, and a channel to our engineers, and you integrate on your own schedule rather than ours.
Common after an acquisition, and fully supported. TaxRails can ingest from multiple sources at once and consolidate filing and remittance per EIN and jurisdiction, so a fragmented payroll estate still produces one clean compliance picture.
Let's connect your stack
Tell us what you run today and we'll show you exactly what the integration looks like — data flow, timeline, and what changes for your team.
Talk to Our Team