Custom Software for Hospitality & Travel
Secure, flexible, and compliant architecture tailored for the unique challenges of the Hospitality & Travel sector.
Vivek Mishra — Founder & Lead Architect, ERPStack
Quick Answer
In short: a hospitality ERP is the system that has to survive night audit. ERPStack builds custom hotel and travel software wired to PMS, CRS, RMS and POS, posting to USALI 12th Revised Edition accounts, keeping card data out of scope under PCI DSS 4.0.1, and computing occupancy tax jurisdiction by jurisdiction.
Why Custom ERP for Hospitality & Travel?
Operating in the Hospitality & Travel sector requires a systems architecture designed for high scalability, operational flexibility, and strict regulatory compliance. Standard off-the-shelf software forces your teams to reshape their workflows to fit rigid software packages. A custom ERP for the Hospitality & Travel industry maps directly to your exact business logic. Deployed to your secure cloud infrastructure (AWS or Azure), the system isolates database schemas, automates redundant reporting tasks, and scales without user seat licensing fees. This ensures your corporate data remains under your absolute control, eliminates vendor lock-in, and lowers long-term operational technology costs by up to 70% over a 3-year period.
Industry Pain Points
- PMS, CRS, RMS, channel manager and POS each hold a different version of the same guest folio
- The night audit is still a manual batch — rooms posted, no-shows charged and the business date rolled by hand
- OTA commission reconciled against Booking.com and Expedia statements in spreadsheets, months after the stay
- USALI 12th Revised Edition took effect on 1 January 2026 and the hospitality chart of accounts never moved
- Card data crosses PMS, POS and gateway in the clear, dragging every hospitality system into PCI DSS scope
- Occupancy tax is coded per property in the ERP, so a New York suite or a Texas $15 threshold silently mis-posts
Engineering Blueprint
A hotel is not retail with beds. A hospitality estate runs a PMS as its operational core, a CRS and channel manager for distribution, an RMS for pricing and a POS for food and beverage — and one guest folio that all of them try to own. ERPStack makes the folio the system of record in PostgreSQL and lets every other system post to it through one REST API.
The night audit is an architectural fixture
Hotel accounting closes nightly, not monthly. The night audit rolls the business date, posts room and tax charges, settles no-shows and freezes the day’s ADR, RevPAR and occupancy — and almost no generic ERP has a concept for it. ERPStack implements it as a scheduled, replayable Node.js job over an append-only folio in PostgreSQL, writing the frozen statistics to TimescaleDB and every step to an Immutable Audit Trail, so a failed run is re-run rather than repaired by hand.
// Drizzle ORM on PostgreSQL — one folio, many posting systems
export const hotel = pgSchema('hospitality');
export const folioPostings = hotel.table('folio_postings', {
propertyId: text('property_id').notNull(),
businessDate: date('business_date').notNull(), // rolled by the night audit
sourceSystem: text('source_system').notNull(), // pms | pos | crs | channel_manager
idempotencyKey: text('idem_key').notNull().unique(),
usaliAccount: text('usali_account').notNull(), // USALI 12th Revised Edition
amountMinor: bigint('amount_minor', { mode: 'number' }).notNull(),
taxRuleId: text('tax_rule_id'), // occupancy tax band, per jurisdiction
});HTNG and OpenTravel are the wire
AHLA publishes the HTNG technical specification library across the systems a hospitality estate actually runs: PMS, central reservation system, channel management and distribution switch, RMS, POS, payment gateway, tokenization service, door locks, housekeeping, loyalty and Customer Relationship Management. OpenTravel supplies the 1.0 XML schemas and the 2.0 OTM model now moving to JSON. ERPStack maps each message once into a typed TypeScript layer validated with Zod, and serves property content and offers from Payload CMS into the web booking engine.
One folio, many posting systems
A double-booked room and a duplicated charge are the same bug: two systems writing the same fact. ERPStack applies Idempotency in API Design to every post and settles it inside a PostgreSQL transaction, so ACID Compliance rather than a Redis lock prevents the duplicate. Rate, availability and inventory reach the channel manager through an Event-Driven Architecture on Apache Kafka, with Webhooks & Event Notifications coming back from each OTA, so a failing push never stalls check-in.
Replace the finance layer, not the PMS
ERPStack applies the Strangler Fig Migration Pattern above the front office: multi-property consolidation, USALI 12th Revised Edition journals, owner distributions and FF&E reserves move first, while Oracle OPERA Cloud or the incumbent PMS keeps room assignment. Summarised journals post into Oracle NetSuite or SAP S/4HANA, so hospitality operations get a real ERP without a front-desk cutover, and Multi-tenant Architecture with per-property RBAC keeps one management agreement out of another.
Our Solutions
- One append-only folio ledger in PostgreSQL that PMS, POS and CRS post to through an idempotent REST API
- Night audit as a scheduled, replayable Node.js job with an Immutable Audit Trail per business date
- HTNG and OpenTravel 2.0 message maps for channel manager, GDS and OTA connectivity, typed in TypeScript and validated with Zod
- USALI 12th Revised Edition chart of accounts in Drizzle ORM, including the Payroll FTE and brand-cost schedules
- P2PE and tokenisation so no hospitality system stores a PAN, with PCI DSS Requirements 6.4.3 and 11.6.1 evidenced
- Multi-tenant Architecture with per-property RBAC and SSO, plus Payload CMS for offers behind the Next.js booking engine
Compliance & Security
Hospitality compliance is unusually physical: a card tapped at a terminal, an ID scanned at a desk, a tip pooled at shift end. ERPStack gives regulated data the shortest possible life — tokens instead of card numbers, Zero-Trust Security between PMS and POS networks, RBAC per property, GDPR Data Compliance on the loyalty profile, and an Immutable Audit Trail a SOC 2 Type II examiner can sample.
PCI DSS 4.0.1 and hotel card flows
PCI DSS v3.2.1 retired on 31 March 2024; 51 of the 64 new requirements in v4.0 became mandatory on 31 March 2025, and v4.0.1 is the current revision. Requirements 6.4.3 and 11.6.1 cover payment page scripts and tamper detection — the e-skimming route into a hospitality booking engine. ERPStack builds systems designed to pass a PCI DSS assessment by removing the card number: P2PE at the terminal, a gateway token on the folio, no cardholder data in PostgreSQL or the AWS account hosting it.
Guest data crosses borders; the schema should know
Regulation (EU) 2024/1028 has applied since 20 May 2026: platforms transmit activity data monthly, machine-to-machine, to a Member State’s single digital entry point — nights, guests per night, guest country of residence, registration number, address and listing URL — with a 4,250-listing threshold below which quarterly suffices. ID-retention rules differ by country, so ERPStack scopes retention per property in PostgreSQL under GDPR.
Occupancy tax is a band table, not a rate
New York City
A New York hotel room carries the city occupancy tax plus a per-room-per-night charge stepping by rent band — 50 cents from $10, $1.00 from $20, $1.50 from $30, $2.00 above $40 — plus state and city sales tax and a $1.50 state unit fee, filed quarterly by the 20th. A 180-day stay becomes exempt, retroactively.Texas, and every jurisdiction after it
State hotel occupancy tax is 6 percent on rooms costing $15 or more per day, with local taxes from $2; returns fall due on the 20th, a $50 penalty applies per late report, 5 percent to 30 days and 10 percent beyond, and timely filers take a 1 percent discount. A hospitality ERP holds that per property, in data.
Tipped payroll after the 2024 vacatur
On 29 October 2024 a federal appeals court vacated the 2021 Dual Jobs Rule, and the Department of Labor restored the prior text effective 17 December 2024. The federal 80/20/30 test is gone, but 29 CFR 531.54 still limits a tip pool to employees who customarily and regularly receive tips where a tip credit is taken, bars managers from sharing, and requires distribution by the regular payday for that workweek — so hospitality payroll is a scheduled ERP job on a $2.13 cash-wage floor.
Standards we engineer to
- PCI DSS 4.0.1
- USALI 12th Revised Edition
- GDPR
- Regulation EU 2024/1028
- PSD2 SCA — Regulation 2018/389
- 29 CFR 531.54 tip pooling
- SOC 2 Type II
Get the Blueprint
Download our comprehensive Systems Architecture Blueprint to see how we architect compliant solutions.
Download BlueprintMetrics & Integrations
Illustrative engineering targets for this sector — the SLAs and capacities we design and build toward, not a live service dashboard.
Night audit across 40 properties
Channel manager rate and availability push
Folio post idempotency window in PostgreSQL
Tax jurisdictions per folio line
Integration: HTNG technical specifications
Integration: OpenTravel 2.0 OTM
Integration: Sabre GDS Travel Integration
Integration: Oracle OPERA Cloud PMS
Integration: P2PE gateway and tokenisation
Integration: USALI 12th chart of accounts
Implementation Process
Folio ledger design
One append-only PostgreSQL folio that PMS, POS and CRS all post to through one idempotent REST API.
Interface inventory
Every HTNG and OpenTravel message crossing PMS, CRS, RMS, channel manager and POS, mapped once in TypeScript.
Night audit as code
A replayable business-date job covering room posting, no-shows, tax accrual and day-end close.
PCI DSS scope reduction
P2PE and tokenisation so no hospitality system stores a PAN, with 6.4.3 and 11.6.1 evidenced.
USALI 12th mapping
Chart of accounts, Payroll FTE schedule and mandatory brand costs mapped in Drizzle ORM to the 2026 edition.
Tax and data-sharing engine
Per-jurisdiction occupancy tax bands plus Regulation (EU) 2024/1028 monthly activity-data transmission.
Frequently Asked Questions
It is the nightly close that rolls the hotel business date. Every hospitality system — PMS, POS, CRS — posts against a business date rather than a wall clock, so room charges, tax accrual, no-shows and day-end statistics land in one atomic batch. ERPStack builds it as a replayable Node.js job over an append-only PostgreSQL folio, with the frozen ADR and RevPAR series written to TimescaleDB.
Yes, and it is already live. HFTP published the 12th Revised Edition on 11 July 2024 with an adoption date of 1 January 2026, overseen by the Global Finance Committee that AHLA and HFTP jointly sponsor. It refines revenue and expense categories including guest loyalty costs and adds schedules for Payroll Full-Time Equivalents and Annual Mandatory Brand and Operator Costs. A hospitality ERP maps both into PostgreSQL.
Not wide parity. The Commission designated Booking as a gatekeeper on 13 May 2024 under case DMA.100019, and Article 5(3) of Regulation (EU) 2022/1925 forbids a gatekeeper preventing business users from offering different prices or conditions through other channels or their own direct sales. A hospitality revenue system needs per-channel rate rules, so ERPStack models channel, market and date as first-class dimensions behind one REST API.
By never letting a card number enter a hospitality system. ERPStack designs the flow so the terminal is P2PE and the PMS holds only a gateway token, which keeps storage, processing and transmission out of PostgreSQL and out of most of the estate. PCI DSS v3.2.1 retired on 31 March 2024 and 51 of the 64 new v4.0 requirements became mandatory on 31 March 2025, including 6.4.3 and 11.6.1.
They are merchant-initiated, so they sit outside payer-initiated strong customer authentication. Delegated Regulation (EU) 2018/389 Article 4 requires two elements from knowledge, possession and inherence when the payer initiates, so a hospitality booking takes the mandate with SCA at reservation and stores the agreement. ERPStack keeps the mandate reference on the folio, never the card, and charges the no-show through the gateway API.
If the unit sits in a designated area, yes. Regulation (EU) 2024/1028 has applied since 20 May 2026 and makes platforms transmit activity data monthly, machine-to-machine, to a Member State's single digital entry point: nights rented, guests per night, guest country of residence, registration number, address and listing URL. Platforms under a 4,250-listing monthly average may report quarterly. A hospitality ERP emits this from its own API.
Buy the PMS. OPERA Cloud carries decades of front-office depth — room assignment, housekeeping, group blocks — that is expensive and pointless to rebuild. Custom ERP development belongs above it: the multi-property folio ledger, USALI 12th mapping, OTA commission reconciliation and owner distributions no hospitality PMS models well. ERPStack builds that layer in Next.js and TypeScript alongside an incumbent PMS rather than replacing it.
It stacks, and part of it is not a percentage. A New York City hotel room carries the city occupancy tax plus a per-room-per-night charge that steps by rent band — 50 cents, then $1.00, $1.50 and $2.00 above $40 — plus state and city sales tax and a $1.50 state unit fee, and a 180-day stay becomes exempt. A hospitality ERP models bands in data, not one rate in code.
For the corporate ledger often yes; for hospitality operations no. Oracle NetSuite will not run a night audit, per-property GOPPAR, OTA commission variance or FF&E reserve draws under a management agreement. ERPStack usually builds the operating layer in Next.js and TypeScript on PostgreSQL, then posts summarised USALI journals into Oracle NetSuite or SAP S/4HANA so one system stays the book of record.
As payroll rules with hard deadlines. Under 29 CFR 531.54 a tip pool may include only employees who customarily and regularly receive tips where a tip credit is taken, managers and supervisors may never share in it, and collected tips must be distributed by the regular payday for that workweek. The cash wage floor is $2.13 and the tipped-employee test is $30 a month, so a hospitality ERP schedules it in PostgreSQL.