Celium Surge · E-invoicing for SARS & MRA

SARS VAT Modernisation is Coming.Your ERP Infrastructure Changes Zero Lines of Code.

Celium Surge connects the systems you already run to SARS and MRA e-invoicing — and keeps invoicing moving when the tax authority’s systems don’t. No ERP upgrade, no database changes, no new screens for your finance team.

Request pilot accessSee how it works
MauritiusAlready e-invoicing? Surge clears MRA invoices in real time.

In Mauritius every invoice must be cleared by the MRA before it’s issued — and SARS plans to reach every point of sale next. When the authority slows down, Surge holds your invoices so your tills keep moving.

Built for

  • Peppol PINT
  • UBL 2.1
  • AS4 transport
  • SARS 5-corner model
  • MRA Invoice Fiscalisation Platform

Why now

Tax is going real-time. Most ERPs aren’t.

Revenue authorities are replacing retrospective returns with live, machine-readable invoices. The systems your business runs on were never designed for that — and they shouldn’t have to be.

Large multinationals will run multi-year programmes with global advisory firms. Celium Surge is built for everyone else: mid-sized businesses that need enterprise-grade compliance without an enterprise-sized project.

Mauritius

Live

Real-time e-invoicing is mandatory now.

Phased in since May 2024, MRA fiscalisation now covers traders with turnover above MUR 40 million. Every invoice is cleared in real time and carries an IRN and QR code.

Read the Mauritius guide

South Africa

Planned

SARS has published its plan.

The 2026 VAT Modernisation consultation proposes structured e-invoices through accredited providers, near real-time reporting and pre-filled returns — phased in, large businesses first.

Read the South Africa guide

Your board

Visible

Every discrepancy, in near real time.

When the authority sees your invoices as they happen, gaps stop hiding in month-end spreadsheets. Compliance becomes an operational risk, not a filing task.

How it works

What happens when the tax engine slows down.

Government systems face traffic spikes, maintenance windows and outages. Celium Surge sits between you and them, so their bad day never becomes yours.

  1. 01

    Accepted instantly.

    Your system hands the invoice to Surge and gets an acknowledgement in milliseconds. The till prints, the customer leaves. Nothing waits on the tax authority.

    Intake01
    POST /v1/invoices→ 202 Accepted{  "id": "inv_8f2c41",  "status": "QUEUED"}

  2. 02

    Buffered durably.

    Every invoice is written to a durable regional queue. Each one carries a unique fingerprint, so it can never be lost — and never be filed twice.

    Regional queues02
    za.peppol    depth 248  durable ✓mu.mra.ifp   depth  31  durable ✓fingerprint  sha256:7c1e…a90bduplicate?   no — accepted once

  3. 03

    Retried patiently.

    If the network, SARS or the MRA is slow or offline, Surge keeps trying with measured back-off. Anything that needs a human is set aside safely and flagged — never dropped.

    Delivery attempts03
    attempt 1  now       timeoutattempt 2  +4s       503attempt 3  +16s      200 OK ✓still failing? → held safely + alert

  4. 04

    Confirmed and returned.

    Once delivery is confirmed, Surge sends the result straight back to your ERP — status and invoice IDs, plus the IRN and QR code in Mauritius — ready for the receipt and the audit file.

    Callback to your ERP04
    POST erp.yourco/webhooks{  "status": "CLEARED",  "irn": "MU-IRN-2026-000184",  "qr": "…/verify/000184"}

  5. 05

    Received and posted.

    In South Africa, supplier e-invoices addressed to you arrive through our certified Peppol Access Point partners. Surge maps them to your ERP’s format and posts them into accounts payable — matched to the supplier, checked for duplicates, accepted or rejected — so your input VAT lines up with what suppliers reported to SARS.

    Inbound to accounts payable05
    IN   PINT UBL invoice  ZA-SUP-8812supplier match   Acme Supplies ✓duplicate?       no ✓posted → AP      PI-2026-00318 ✓response → partner   ACCEPTED

Zero-change integration

We come to where your data lives.

No ERP upgrade. No database changes. No new screens for your finance team. Whatever you run — off-the-shelf, heavily customised or built in-house — Surge adapts to it.

Push

Your system sends.

If your system can export a file or call a web address, that’s enough. Whatever shape your data is in, we map it — you change nothing.

Any format your system already produces

Poll

We collect.

A lightweight, secure agent reads new invoices straight from your existing database on a schedule. Read-only. No schema changes.

Any database — on-premise or in the cloud

Plug

One-click sync.

Running cloud accounting or billing software? Connect your account and Surge picks up every approved invoice automatically.

Any cloud platform with an API

Not sure which route fits? If your system can produce an invoice, Surge can connect to it. Tell us about your setup →

Two jurisdictions

You send one format. We speak both.

South Africa and Mauritius chose very different architectures. You integrate once — Surge handles the translation, signing and routing for each. Send and receive e-invoices without changing your ERP.

ZA · SARS

South Africa

Decentralised · Peppol 5-corner
  • Translated into Peppol PINT / UBL e-invoices
  • Sent and received through certified Peppol Access Point partners
  • Supplier e-invoices posted straight into your accounts payable
  • Built for SARS’s proposed VAT Modernisation model

MU · MRA

Mauritius

Centralised · Real-time clearance
  • Signed and submitted to the Invoice Fiscalisation Platform
  • Invoice Registration Number returned in real time
  • Compliance QR code sent back for your receipt

Security & reliability

Built like infrastructure. Because it is.

You’re trusting us with your billing stream. Surge is engineered around isolation, durability and a complete audit trail from day one.

Isolated by design

Every business’s data is separated at the database engine itself, not just in application code.

Encrypted end to end

TLS in transit and encryption at rest, across every service that touches your invoices.

Seven-year audit vault

Every submission and authority response is archived to write-once storage that can’t be altered.

Never filed twice

Each invoice is fingerprinted on arrival. Resends and retries are recognised and ignored.

Built on Rust

A memory-safe, compiled engine chosen for predictable performance under heavy load.

Designed for POPIA

Data minimisation, access control and clear retention built in from the first line of code.

Pilot programme

Secure an onboarding slot.

We’re onboarding a limited first cohort of businesses in South Africa and Mauritius. Tell us about your systems and our integration team will map your zero-change pipeline.

  1. 1

    Share your setup

    About two minutes. Your region, systems and volumes.

  2. 2

    Integration review

    We map your zero-change route with your team.

  3. 3

    Pilot onboarding

    A limited first cohort, onboarded hands-on.

Celium Surge is currently in its pilot phase and isn’t yet available for general purchase. Submitting your profile reserves a place in the onboarding queue — no commitment.

Step 1

FAQ

Questions, answered.

Is e-invoicing mandatory in South Africa yet?

Not yet. SARS published its VAT Modernisation consultation paper in August 2026, proposing structured e-invoicing, near real-time reporting and a phased rollout that starts with large businesses. No mandatory date has been set — which makes now the cheapest time to prepare.Read our SARS e-invoicing guide →

We’re in Mauritius and already fiscalising invoices. Can Surge help?

Yes. MRA e-invoicing is mandatory in stages since May 2024 and now reaches traders above MUR 40 million turnover. Surge connects your existing billing system to the MRA in real time, returns the IRN and QR code to your system, and keeps your tills moving if the platform is slow.Read our MRA e-invoicing guide →

Who is Celium Surge for?

Mid-sized businesses, groups and their advisers in South Africa and Mauritius — typically running established systems such as Sage, Syspro or custom-built software — who need to comply with e-invoicing without a costly ERP upgrade or a long consulting programme.

Do I need my own Access Point?

No. In South Africa, Surge works with certified Peppol Access Point partners. They handle the secure AS4 network exchange and reporting to SARS, while Surge connects them to your ERP in both directions. You don’t need to find, contract or integrate an Access Point yourself.

Can Surge receive supplier invoices too?

Yes. Supplier e-invoices addressed to you arrive through our Access Point partners. Surge maps them to your ERP’s format and posts them into accounts payable as purchase invoices — with supplier matching, duplicate checks and accept or reject responses — so your input VAT lines up with what suppliers reported to SARS.

Do we need to change our ERP or accounting system?

No. Surge connects to what you already run — by receiving a file or API call your system already produces, by reading your existing tables with a secure read-only agent, or through a cloud connector. Your finance team keeps working exactly as they do today.

What happens if SARS or the MRA is slow or offline?

Your system still gets an instant acknowledgement, so checkouts and billing carry on. Surge holds each invoice in a durable queue and keeps retrying until the authority confirms it, then sends the result back to you automatically.

Could an invoice be lost or submitted twice?

Surge is designed so that neither happens. Every invoice is stored durably before we acknowledge it, and each one is fingerprinted so resends and retries are recognised and never filed twice.

Where is our data stored, and who can see it?

Your data is isolated from every other customer at the database level, encrypted in transit and at rest, and retained in a tamper-proof archive for audit purposes. We’ll walk through hosting and data residency in detail during your integration review.

When can we start?

We’re onboarding a limited pilot cohort now. Submit your integration profile and we’ll be in touch to plan your onboarding.

How is Celium Surge priced?

Pricing is usage-based — a fee per processed invoice — so it scales with your business. Pilot terms are shared during your integration review.