01
Ecommerce to ledger
Orders, refunds, fees and payouts from your store posted as invoices, payments and journals, not one lump sum.
FIG 01 · Accounting Software Integration
Accounting software integration that keeps your books and systems in sync
QuickBooks, Xero, Sage, Tally and Zoho Books connected to your store, CRM, ERP and apps, built for each platform’s 2026 API limits and pricing, with every sync reconciled and logged.
See how it works
FIG 02 · Quick answer
What does accounting software integration involve?
Elgrith builds accounting software integrations that connect QuickBooks, Xero, Sage, Tally and Zoho Books to your store, CRM, ERP and apps. We design for each platform’s API limits and 2026 pricing tiers, map your chart of accounts, reconcile every sync, and support compliance flows such as UK Making Tax Digital and India’s GST e-invoicing.
- Platforms: QuickBooks, Xero, Sage, Tally, Zoho Books
- 5
- Projects delivered since 2015
- 1,000+
- Clients across the USA, UK and India
- 250+
- Your code, configuration and IP
- 100%
FIG 03 · Why it matters
Accounting APIs got stricter, and pricier, in 2026.
From Xero Developer and GOV.UK, read on 23 Oct 2026.
01
2 Mar 2026
Xero’s paid app tiers took effect
Xero’s developer pricing moved apps onto tiers (Starter, Core, Plus, Advanced, Enterprise) with connection and data-egress allowances. Starter is free for up to 5 connections.
Source: Xero Developer, pricing and app tiers (from 2 Mar 2026)(opens in a new tab)02
60
Xero API calls per minute, per tenant
Xero lists 5 calls in progress at once, 60 per minute and 5,000 per day; limits vary by tier. A sync that ignores them gets HTTP 429 errors.
Source: Xero Developer, API limits (read 23 Oct 2026)(opens in a new tab)03
6 Apr 2026
Making Tax Digital for Income Tax began
For sole traders and landlords with qualifying income over £50,000, then over £30,000 from 6 April 2027 and over £20,000 from 6 April 2028.
Source: GOV.UK, Check if you’re eligible for Making Tax Digital for Income Tax (updated 26 Mar 2026)(opens in a new tab)
FIG 04 · Rules and dates
Compliance built in
Tax rules decide what your integration must record, and when. These are the dated rules we design around, so the sync produces data your accountant can file from.
| Rule | Who it affects | Date | What the integration must do |
|---|---|---|---|
| Making Tax Digital for VAT (UK) | VAT-registered UK businesses | In force | Keep digital records and file through MTD-compatible software, with no manual re-keying in between |
| MTD for Income Tax (UK) | Sole traders and landlords with qualifying income over £50,000 | From 6 Apr 2026 | Keep digital records and send quarterly updates through compatible software |
| MTD for Income Tax (UK) | Qualifying income over £30,000 | From 6 Apr 2027 | Same, for a wider group |
| MTD for Income Tax (UK) | Qualifying income over £20,000 | From 6 Apr 2028 | Same, for a wider group |
| MTD for Income Tax quarterly updates (UK) | Everyone in MTD for Income Tax | 7 Aug, 7 Nov, 7 Feb, 7 May | Have each quarter’s records synced and categorised in time |
| GST e-invoicing 30-day limit (India) | Taxpayers with AATO of ₹10 crore or more | From 1 Apr 2025 | Report each e-invoice to the IRP within 30 days of its date, or it can’t be reported |
Sources: GOV.UK, Check if you’re eligible for Making Tax Digital for Income Tax (updated 26 Mar 2026) and Send quarterly updates (updated 16 Oct 2026); GSTN advisory of 5 Nov 2024 on the 30-day e-invoice reporting limit. Checked 23 Oct 2026. This is general guidance for system design, not tax or legal advice: confirm your own obligations with your accountant.
Choosing a platform? Read Xero vs QuickBooks vs Sage in 2026FIG 05 · What you get
Accounting software integration services
Accounting software integration connects the systems where money moves (your store, CRM, payments, payroll and custom apps) to the ledger, so invoices, payments and journals arrive once, in the right accounts, without re-keying.
02
CRM to invoicing
Won deals and subscriptions turned into invoices, with payment status flowing back to the CRM.
03
Payments and payouts
Payment-provider payouts split into sales, fees and refunds, then matched to the bank feed.
04
Payroll journals
Payroll runs posted as summarised journals to the right cost centres.
05
ERP and multi-entity
Subsidiaries on QuickBooks or Xero rolled up into a group ERP or consolidation.
06
One-way or two-way sync
One system of record per field, decided up front, so two systems never fight over the same data.
07
Chart-of-accounts mapping
Products, tax codes, tracking categories and classes mapped with your accountant before the first sync.
08
Reconciliation and alerts
Every sync logged, totals reconciled daily, and failures sent to a person, not a silent log.
Deliverables
11
deliverables, in writing
Included in every build, written into your fixed quote before work starts.
FIG 06 · Platforms
The accounting platforms we integrate
Each platform has its own API, limits and pricing. We design the integration around them, so it keeps running as volume grows.
- Store
- CRM
- Payments
Sync layer
- QuickBooks
- Xero
- Sage or Tally
QuickBooks Online
- API
- REST with OAuth 2.0, per company (realm ID)
- Watch
- Core vs CorePlus call metering
QuickBooks Desktop
- API
- Web Connector on the machine running QuickBooks
- Watch
- The machine and QuickBooks must be running to sync
Xero
- API
- Xero Accounting API with OAuth 2.0, per tenant
- Watch
- Rate limits and app-tier allowances
Sage
- API
- Sage Accounting API v3.1; Sage 50 and Sage 200 integrations
- Watch
- Which Sage product and edition you run
TallyPrime
- API
- XML or JSON over HTTP, TDL and ODBC
- Watch
- Tally runs on your machine or server, not in the cloud
Zoho Books
- API
- REST with OAuth 2.0, per organisation
- Watch
- Data-centre region in the API domain
FIG 07 · QuickBooks
QuickBooks integration services
QuickBooks Online and QuickBooks Desktop integrate in completely different ways. Online uses a cloud REST API; Desktop needs the Web Connector on the machine where QuickBooks runs.
06principles
QuickBooks Online
REST API with OAuth 2.0 and refresh tokens, webhooks for change events, and batch requests to keep call counts down.
QuickBooks Desktop
Web Connector integrations, scheduled around when the QuickBooks machine is on, or a planned move to Online.
Intuit App Partner Program
Intuit classifies calls as Core (mostly data-in, not metered) or CorePlus (mostly data-out, metered by tier). We design syncs that read less.
Idempotent writes
Every invoice and payment carries a reference, so a retried sync never posts a duplicate.
Classes and locations
Classes, locations and tax codes mapped so reports in QuickBooks still make sense.
Migrations to QuickBooks
Data moved from Sage, Tally or spreadsheets, with opening balances reconciled.
FIG 08 · Xero
Xero integration
Xero moved apps onto paid tiers from 2 March 2026 and limits API calls per tenant. A good Xero integration is designed around both from the first line of code.
06principles
Rate limits
Xero lists 5 concurrent calls, 60 a minute and 5,000 a day per tenant, varying by tier. We queue, batch and back off on HTTP 429.
App tiers and egress
Your expected connections and data volume checked against Xero’s tiers before you build, so the running cost is known.
Webhooks
Xero webhooks for contact and invoice changes instead of polling, which saves calls.
OAuth 2.0 per tenant
Token refresh and tenant connections handled, with a clear reconnect flow when access lapses.
Tracking categories
Departments, regions or projects mapped to Xero tracking categories.
MTD-ready records
Synced data complete and categorised for VAT and Income Tax quarterly updates.
FIG 09 · Sage
Sage integration for UK businesses
“Sage” covers several products. We start by confirming which one and which edition you run, because the integration method follows from that.
06principles
Sage Accounting
The cloud product, through the Sage Accounting API v3.1 with OAuth 2.0.
Sage 50
Desktop accounts integrated with your store, CRM or stock system, with the sync designed around where Sage 50 runs.
Sage 200
Mid-market Sage integrated with warehouse, ecommerce and reporting systems.
Moving off Sage
Sage data migrated to Xero, QuickBooks, Business Central or Odoo.
Dynamics 365 consultingVAT and MTD
Records structured so VAT returns and MTD submissions come straight from the ledger.
UK English, UK rules
UK spelling, UK VAT codes and UK GDPR-aware data handling.
FIG 10 · India
Tally integration and GST e-invoicing (India)
TallyPrime supports integration through TDL, JSON and XML over HTTP, and ODBC, and TDL can call external APIs (TallyHelp, updated 11 Jun 2026). We use that to keep Tally and your other systems in step.
06principles
TallyPrime sync
Sales, purchases, stock and ledgers pushed to or pulled from Tally over XML or JSON.
TDL customisation
Tally Definition Language for custom fields, reports and outbound API calls.
ODBC reporting
Tally data read over ODBC into dashboards and other systems.
GST e-invoicing
E-invoices from Tally or your ERP sent to the IRP, with IRN and QR code written back, inside the 30-day limit for AATO of ₹10 crore or more.
Zoho Books integration
Zoho Books connected to your store, CRM and payments through its REST API, with GST fields mapped.
FIG 11 · Process · 6 steps
Map the accounts, then sync
A free call, a mapping workshop and a fixed written quote, then builds in a sandbox with weekly demos and reconciliation tests before anything touches your live books. You own the code.
- Step 01
Free call
Tell us which systems hold money data today, which accounting platform you use and what keeps breaking. We ask about volumes, entities, tax rules and who signs off the books.
- Step 02
Assessment
A mapping workshop with your finance team: chart of accounts, tax codes, tracking, system of record per field, and the platform’s API limits and pricing tier for your volumes.
- Step 03
Fixed written quote
A written scope, a fixed quote and the plan for data migration, testing and hand-over, before any work starts.
- Step 04
Sprints with weekly demos
Builds against sandbox or demo companies, with a demo every week and reconciliation tests that compare totals between systems.
- Step 05
Launch
A dated go-live with a backfill plan, monitoring, alerting and a person named for each alert.
- Step 06
Support
Changes, new connections and API updates from QuickBooks, Xero, Sage, Tally or Zoho handled on terms agreed in your written scope.
FIG 12 · What you get
Everything included
Written into your fixed quote, so you know exactly what you are paying for before work starts.
11items
- Written scope and fixed quote
- Field and chart-of-accounts mapping, signed off by finance
- System-of-record decision per field
- API tier and running-cost estimate for your volumes
- Integration code in your repository
- Sandbox test results and reconciliation reports
- Retry, idempotency and rate-limit handling
- Monitoring, logging and alerting
- Backfill and go-live plan
- Runbook for your finance and IT teams
- Hand-over: code, configuration and credentials are yours
FIG 13 · Tech & tools
The tools behind the work
Proven, well-supported tools, chosen for your project and set up in accounts your business owns.
- QuickBooks Online API
- QuickBooks Web Connector
- Xero Accounting API
- Sage Accounting API
- TallyPrime
- TDL
- Zoho Books API
- OAuth 2.0
- Webhooks
- Node.js
- Python
- PostgreSQL
- Shopify
- Stripe
- Razorpay
- n8n
FIG 14 · Who it’s for
One integration team for US, UK and Indian accounting stacks.
Different platforms and tax rules, the same method: map first, reconcile always, your code.
3 audiences
US teams
QuickBooks integrations for US companies.
US projects run through our New York client partner, with engineering at our New Delhi HQ. Most US work is QuickBooks Online connected to stores, CRMs, payments and payroll.
- New York client partner
- QuickBooks Online and Desktop
- Store, CRM and payment links
- Fixed written quote
UK teams
Xero and Sage integration for UK organisations.
UK projects run through our London client partner, with engineering at our New Delhi HQ. We build around Making Tax Digital for VAT and Income Tax, write in UK English and agree working hours in your written scope.
- London client partner
- Xero and Sage
- MTD for VAT and Income Tax
- Fixed written quote in GBP
India
Tally and Zoho Books integration for Indian businesses.
Integrations built at our New Delhi HQ, with GST, e-invoicing and the IRP 30-day limit planned in, and a fixed written quote in rupees.
- Built at our New Delhi HQ
- TallyPrime and Zoho Books
- GST e-invoicing
- Fixed written quote in rupees
FIG 15 · Working with us from the USA and UK
Built in New Delhi. Run on your hours.
Every project gets a point of contact in New York or London and an engineering team in New Delhi. Here is how today’s working days line up, live.
New York
North America
--:--ET
New Delhi team Your working day- Shared working time
- ≈ 3 hours today
- New Delhi is
- 10.5 h ahead
- Live calls, your time
- 9 a.m. to 12 p.m. ET
London
UK & Europe
--:--UK
New Delhi team Your working day- Shared working time
- ≈ 4.5 hours today
- New Delhi is
- 5.5 h ahead
- Live calls, your time
- 9 a.m. to 1:30 p.m. UK
Three ways to work together
- 01
Fixed-scope project
A written scope, one fixed price and a dated plan. Suits websites, apps and MVPs.
- 02
Dedicated team
Designers and engineers on your roadmap every month, billed monthly.
- 03
White label
For US and UK agencies: our work, your brand, unbranded deliverables.
Every engagement
- Fixed quote in USD, GBP or INR after a free 30-minute call
- NDA before discovery. You own all code, designs and content
- A working demo every sprint, not status slides
- Reply within one business day, calls inside your hours
Book a call
Calls on ET or UK hours
FIG 16 · Decide
Connector, iPaaS or custom integration?
Not every sync needs custom code. Start with the simplest option that keeps your books right at your volumes, and move up only when it stops coping.
| Marketplace connector | iPaaS (Zapier, Make, n8n) | Custom integration | |
|---|---|---|---|
| Best for | A standard pairing, such as a popular store and Xero | Simple flows between a few apps | High volume, unusual mapping, or several systems |
| Mapping control | What the app offers | Good, per workflow | Full |
| Rate limits and retries | Handled by the vendor | Partly; you check them | Designed in |
| Reconciliation | Usually manual | Usually manual | Built in and reported |
| Who owns it | The vendor | You, on their platform | You: code in your repository |
FIG 17 · Platforms
QuickBooks vs Xero vs Sage vs Tally vs Zoho Books for integrations
How the five platforms differ for integration work. Plan prices aren’t listed here; check each vendor’s own pricing page.
| QuickBooks Online | Xero | Sage Accounting | TallyPrime | Zoho Books | |
|---|---|---|---|---|---|
| API style | REST | REST | REST (v3.1) | XML or JSON over HTTP, TDL, ODBC | REST |
| Sign-in for apps | OAuth 2.0 | OAuth 2.0 | OAuth 2.0 | Local access to Tally | OAuth 2.0 |
| Runs | Cloud | Cloud | Cloud | Your machine or server | Cloud |
| 2026 API cost note | Core vs CorePlus metering | Paid app tiers from 2 Mar 2026 | Check Sage’s developer terms | Local integration on your Tally install | Check Zoho’s API limits |
FIG 18 · Engage
Fixed-scope project vs dedicated integration engineers vs team extension
We don’t publish rates. This is how the three ways to work with integration engineers compare.
| Fixed-scope project | Dedicated specialist | Team extension | |
|---|---|---|---|
| Best for | A defined integration or migration | A steady backlog of changes, reports and integrations | A deadline, a migration wave or a backlog spike |
| Who manages the work | Us, against a written scope | You, in your sprint | You, with our lead |
| How it is priced | One fixed quote | Monthly, per specialist | Monthly, per team |
| Code, configuration and IP | Yours | Yours | Yours |
FIG 19 · Compare
One-way vs two-way accounting sync
| One-way sync | Two-way sync | |
|---|---|---|
| How data moves | From the source system into the ledger | Both ways, field by field |
| Typical use | Store or CRM invoices into QuickBooks or Xero | Payment status back to the CRM; contacts kept in step |
| Risk | Low: one system of record | Higher: needs a rule for every conflict |
| What we decide first | The source and the target accounts | The system of record for each field |
| Best for | Most integrations | When teams work in both systems every day |
FAQ
Frequently asked questions
Straight answers about Accounting Software Integration with Elgrith.
Accounting software integration connects your accounting platform, such as QuickBooks, Xero, Sage, Tally or Zoho Books, to the other systems where money moves: your store, CRM, payments, payroll and custom apps. Invoices, payments and journals then arrive once, in the right accounts, without re-keying.
FIG 20 · Related
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