Vendor Management · OTP invoice portal

Vendor management portal for growing Indian businesses — stop managing your vendors on WhatsApp

Your vendors send invoices on WhatsApp. Your finance team needs a GSTR-2B-matched, audit-ready bill. Every month that gap costs you ITC, AP hours, and the "payment kab milega" calls that eat the afternoon. Varisya builds and runs a self-hosted vendor portal where vendors submit invoices via OTP link — no app, no login — and draft bills appear in your accounting system automatically.

OTP vendor login Invoice → draft bill Section 43B(h) tracking Vendor document onboarding Payment status visibility Data on your servers

What's broken

Six ways WhatsApp, email, and phone calls fail as a vendor management system

Over 72% of Indian small businesses use WhatsApp to communicate payment-related information with vendors — but fewer than 35% follow standardised invoicing practices (KPMG-Meta India SMB report). WhatsApp is fast. But at 50, 100, or 200 vendors it becomes an operational liability and a compliance risk your auditor will eventually find.

1 Invoices get lost in chat threads. A vendor submits an invoice on WhatsApp at 10pm. By morning it is buried under 40 other messages. Month-end close slips as your AP team manually scrolls through 200 messages looking for what came in and what did not. There is no single inbox — invoices arrive on three different phones, two email addresses, and occasionally by hand.
2 Missing invoices create ITC you will never claim. Every rupee your vendor charges GST on is an ITC credit you are entitled to — but only if the vendor's invoice appears in your GSTR-2B. A WhatsApp invoice photo that never gets entered in the system, or is entered with a typo in the GSTIN, means the ITC is claimed in your books but absent in the portal — a mismatch that shows up during scrutiny. ITC typically represents 12–18% of purchase value.
3 The 45-day payment rule has real tax consequences. Section 43B(h) of the Income Tax Act (Finance Act 2023) disallows expense deductions if you pay an MSME-registered vendor beyond 45 days of the invoice. Managing this deadline across 100 vendors via WhatsApp and a spreadsheet is effectively impossible. The disallowance is not theoretical — it is appearing in scrutiny notices.
4 All vendor knowledge lives in one person's phone. The purchase manager knows which vendor supplies which material, who has better lead times, who has raised prices, whose documents are on file, and whose bank account changed last month. When that person is on leave or resigns — which happens — the procurement function grinds to a halt. Years of vendor relationship knowledge walk out the door with them.
5 "Payment kab milega" calls consume the AP team's afternoon. Every vendor whose invoice is pending calls or messages to ask when they will be paid. The AP team has to stop what they are doing, find the invoice in a WhatsApp thread, check with the approver, and call back — or promise to call back and forget. At 150 vendors this is a daily noise problem that prevents the AP team from doing actual work.
6 Onboarding a new vendor takes weeks. Collecting a new vendor's GST certificate, PAN card, cancelled cheque, bank details, and Udyam certificate by WhatsApp and email — with reminders, follow-ups, and manual filing — takes two to four weeks on average. During that time the vendor cannot be paid, and sometimes cannot even start supplying. The bottleneck is invisible until a buying season arrives.

Section 43B(h) — the tax consequence most Indian SMEs have not priced in. From FY 2023-24, if you purchase from an MSME supplier and do not pay within 45 days of the invoice date (or the agreed credit period, whichever is shorter), the deduction for that purchase is disallowed in that year — you can only claim it in the year of actual payment. With 50+ MSME vendors and manual payment tracking, disallowance is a near-certain outcome. A vendor portal with automatic deadline tracking eliminates the exposure.

What Varisya builds

A self-hosted vendor portal — built for your vendor base, run on your infrastructure

Varisya builds and runs a vendor management portal using the Vendor Management module from the Nidhi Stack — a self-hosted system designed for ongoing vendor relationships, not just one-time onboarding. Every portal is configured to your vendor base, your invoice approval workflow, and your accounting system. It is not a SaaS subscription — it is your portal, on your servers, maintained by a dedicated engineer on an annual retainer.

✓ OTP vendor portal — no app, no login to remember. Vendors receive a link via SMS or WhatsApp. They tap it, enter the OTP sent to their mobile, and they are inside the portal. No account to create, no password to remember, no app to install. If a vendor can read a message on their phone, they can submit an invoice. The OTP session creates a legally attributed, timestamped record of every submission.
✓ Invoice submission → automatic draft bill. Vendors upload their GST invoice — or enter invoice details directly if they do not have a digital copy. The portal validates the GST fields (GSTIN format, invoice date, HSN/SAC codes, tax breakdown) and creates a pre-filled draft bill in your accounting system. No manual data entry, no re-keying errors, no GSTIN typos creating ITC mismatches. Your AP team reviews and approves the draft — the data is already there.
✓ Section 43B(h) payment compliance tracker. Every invoice from an MSME-registered vendor carries an automatic deadline — 45 days from the invoice date, or the agreed credit period if shorter. The AP dashboard flags invoices approaching that deadline so your team can prioritise payment before the deduction is lost. No manual cross-referencing of invoice dates against a spreadsheet.
✓ Vendor onboarding document collection. New vendors go through a structured onboarding flow before they can submit invoices: GST registration certificate, PAN card, Udyam (MSME) certificate, cancelled cheque or bank statement, and authorised signatory proof — all collected through the OTP-verified portal and stored in a centralised vendor profile. Your procurement or accounts team approves the onboarding. One person leaving takes nothing with them.
✓ Vendor payment status visibility. Vendors can check the status of every invoice they have submitted — received, under review, approved, payment scheduled, paid — without calling your AP team. "Payment kab milega" becomes a self-service query. Vendors see only their own invoices and payment history; vendor rates and terms are not visible to other vendors.
✓ AP approval queue and three-way matching. Your AP team sees all incoming invoices in a single dashboard — no more scrolling WhatsApp, no more chasing email threads. Large-value invoices route for a second approval from the finance head. Where purchase orders exist, the portal matches the submitted invoice against the PO and goods receipt note and flags discrepancies before approval — catching billing errors before payment, not after.
✓ All data on your own servers. The portal runs on your own infrastructure — vendor documents, invoice records, payment history, and approval logs stored on a server you control, not on Varisya's cloud and not on a third-party SaaS platform. Your vendor relationships, pricing, and commercial terms are not on anyone else's server.

Who this serves

Which Indian businesses need a vendor management portal

Any business managing more than 30–40 vendors regularly — where an invoice going missing, a payment deadline being missed, or a document not on file creates an operational or compliance problem.

Business type	What they manage	What breaks without a portal
Manufacturers	50–300 raw material and component vendors — invoices, rate revisions, quality documentation	AP team buried in WhatsApp; ITC mismatches from GSTIN typos; 43B(h) disallowances on MSME suppliers; knowledge concentrated in one purchase manager
FMCG and food distributors	Multiple supplier invoices daily — rate changes, scheme invoices, credit notes	Invoices arriving on multiple phones overnight; manual SAP/ERP entry causing backlogs; missed deductions on supplier scheme credits
Retailers and trading houses	50–200 suppliers across categories — vendor onboarding, invoice processing, payment cycles	New supplier activation delayed by manual document collection; WhatsApp invoice photos never entered; vendor payment complaints from cash-flow-squeezed MSME suppliers
Construction and real estate developers	Subcontractors, material vendors, service vendors — work completion certificates, running account bills, retention tracking	Subcontractor payments managed by phone; no audit trail for dispute resolution; retention tracking done in Excel
Logistics and fleet operators	Transporter invoices, fuel vendors, workshop bills — high volume, recurring vendors	Transporter invoices submitted weekly by dozens of small operators; each one a potential GSTR-2B mismatch if GSTIN or invoice number is wrong

The trigger is usually one of three things: a GST scrutiny notice citing ITC mismatches, a key purchase manager who resigned or went on leave, or a finance head who has just calculated how much the 43B(h) disallowance cost the company in the last assessment. Learn more about how Varisya implements custom software for growing Indian businesses.

Honest comparison

WhatsApp + email + phone vs a Varisya vendor management portal

The informal system works at 20 vendors. At 80 it is slow and error-prone. At 200 it is a compliance liability. Here is a direct comparison.

Factor	WhatsApp + email + phone	Varisya vendor portal
Invoice submission	Photo on WhatsApp or email attachment — multiple channels, multiple phones	Single OTP-authenticated portal — one inbox for all vendors
Draft bill creation	Manual data entry by AP team — typos, GSTIN errors, retyping line items	Automatic draft bill from submitted invoice — no manual entry
GST compliance	Invoice photo may be non-compliant — caught at GSTR-2B reconciliation, if at all	Portal validates GSTIN, HSN/SAC, and GST breakdown at submission — errors flagged before entry
Section 43B(h) tracking	Manual Excel tracker — misses MSME status, misses deadlines	Automatic 45-day flag per MSME vendor invoice — no manual tracking required
Vendor onboarding documents	WhatsApp, email, physical — scattered, incomplete, no single record	Structured OTP-verified onboarding — all documents in one vendor profile on your server
"Payment kab milega" calls	Vendor calls AP team; AP checks WhatsApp and calls back	Vendor checks portal for payment status — self-service, no AP time spent
Vendor knowledge	In the purchase manager's phone and memory — single point of failure	In the vendor profile on your server — accessible to the whole team
Three-way matching (PO / GRN / invoice)	Manual cross-check against Tally or Excel — often skipped under time pressure	System matches submitted invoice against PO and GRN before AP review — discrepancies flagged automatically
Data storage	On personal phones, WhatsApp cloud backups, and inboxes outside your control	On your own server — you control who has access and when data is retained or deleted
Scalability	Collapses at 100+ vendors — too many chats, too many channels, too much manual work	Handles 500+ vendors without adding AP headcount — volume is a configuration, not a problem

How it works

From first call to live vendor portal in five to seven weeks

Varisya designs, builds, deploys, and runs the portal on an annual retainer. Your AP team and procurement team are trained on the dashboard before go-live. The same engineer who builds it maintains and evolves it as your vendor base changes.

1 Vendor base mapping (week 1). We audit your current vendor management process: how many active vendors, which are MSME-registered, what documents you have on file, how invoices currently arrive, what your AP approval steps look like, and which accounting system you use (Varisya Books, Tally, or another ERP). We identify every gap and agree the target workflow before a line of code is written.
2 Portal configuration (weeks 2–3). We configure the vendor onboarding flow to your document requirements, set up the invoice submission portal with your GST validation rules, build the AP approval workflow to your team's authority matrix (who approves what value threshold), and integrate the draft bill creation with your accounting system. You sign off on the configuration before we build the backend.
3 Deployment on your infrastructure (weeks 3–5). The portal is deployed on your own server with your domain, your branding, and your database. We migrate existing vendor records into the portal so your team does not start with an empty vendor database — current vendors can begin submitting invoices from day one of go-live.
4 Controlled go-live with pilot vendors (week 5–6). We run a pilot with a small group of vendors — typically 10 to 20 — before opening to the full vendor base. Your AP team uses the dashboard for real invoices, vendors submit real invoices via the portal, and we resolve any configuration gaps before the full rollout.
5 Full rollout and ongoing maintenance on the annual retainer (week 7+). All vendors are onboarded to the portal. From this point, new vendor onboarding, invoice workflow changes, additional document types, MSME compliance rule updates, and integration with new accounting modules are all handled by the same engineer on your retainer — the portal evolves with your vendor base rather than freezing at go-live configuration.

Common questions

Frequently asked about Varisya's vendor management portal

What is a vendor management portal for Indian businesses?

A vendor management portal is a self-hosted web application that replaces the WhatsApp messages, email threads, and phone calls through which Indian businesses currently manage their vendor relationships. Vendors authenticate with a one-time password on their mobile, submit GST-compliant invoices, upload onboarding documents (GSTIN, PAN, cancelled cheque), and check payment status — without installing an app or remembering a login. The buying company's AP team sees all incoming invoices in a single approval queue, submitted invoices auto-create draft bills in the accounting system, and the 45-day MSME payment deadline is tracked automatically to protect expense deductions under Section 43B(h).

My vendors are small businesses who only know WhatsApp — will they actually use the portal?

This is the most common concern, and it is exactly why the portal uses OTP authentication instead of a username and password. Vendors receive an SMS or WhatsApp link. They tap it, enter the OTP sent to their mobile number, and they are inside the portal — no account to create, no password to remember, no app to install. If a vendor can read a WhatsApp message, they can submit an invoice. Varisya configures the portal to your vendors' literacy level: minimal steps, large buttons, and instructions in the language your vendors use. The first submission takes three minutes. After that it is faster than typing out a WhatsApp message.

How does the invoice-to-draft-bill conversion work?

When a vendor submits a GST invoice through the portal, the system reads the invoice number, date, GSTIN, line items, GST breakdown, and total, and creates a pre-filled draft bill in your accounting system — Varisya Books or, if you are on a different system, via a structured export your team can import in one click. Your AP team reviews the draft bill, matches it against the purchase order or goods receipt if required, and approves payment. No manual data entry. No risk of a typo in the GSTIN creating an ITC mismatch. The vendor's invoice and the draft bill are linked in the system so an audit query about any payment can be answered in seconds.

How does this help with Section 43B(h) and the 45-day MSME payment rule?

Finance Act 2023 added Section 43B(h) to the Income Tax Act: if you buy from an MSME-registered supplier and do not pay within 45 days of the invoice date (or the agreed credit period, if shorter), you cannot deduct that expense in the year of purchase — you can only deduct it in the year you actually pay. The portal tracks the invoice date and Udyam (MSME) registration status of every vendor. When a vendor-supplier invoice approaches the 45-day mark unpaid, the AP dashboard flags it automatically so your team can prioritise the payment before the deduction is lost. No more manually cross-checking invoice dates against an Excel tracker.

What documents does the vendor portal collect during onboarding?

The onboarding flow is configured to your vendor qualification requirements, but the standard set for Indian businesses covers: GST Registration Certificate, PAN Card, Udyam (MSME) Certificate (where applicable), Certificate of Incorporation or partnership deed, cancelled cheque or bank statement showing account details, and authorised signatory identity proof. Each document is uploaded through the OTP-verified session and stored in the vendor's profile on your own server — not on Varisya's infrastructure. Your procurement or accounts team reviews and approves the onboarding before the vendor is enabled to submit invoices.

Can our vendors check payment status without calling our AP team?

Yes — this is one of the highest-impact features for AP teams. Vendors can log in via OTP at any time and see the status of every invoice they have submitted: received, under review, approved, payment scheduled, or paid (with payment date). When a vendor calls asking "payment kab milega", your AP team can tell them to check the portal — and the calls drop sharply within the first month. The portal does not show vendors what other vendors are paid; each vendor sees only their own invoices and payment history.

How is this different from Varisya's document workflow portal?

Varisya's document workflow portal (Forms+) is a general-purpose intake system — it collects documents from any submitter type (customers, borrowers, employees, vendors) and routes them for internal review. The vendor management portal is purpose-built for ongoing vendor relationships: it combines initial document onboarding with recurring invoice submission, draft bill creation in the accounting system, AP approval workflows, payment status tracking, and MSME compliance monitoring. If your primary need is one-time vendor onboarding as part of a broader KYC or intake workflow, the document portal covers it. If you need to manage the ongoing cycle of vendor invoices, approvals, and payments month after month, the vendor management portal is the right fit.

What happens to our ITC if a vendor submits an incorrect or non-compliant GST invoice?

The portal validates GST invoice fields at the point of submission — GSTIN format, invoice date, HSN/SAC codes, and GST breakdown — and flags obvious errors before the vendor finalises the submission. This catches the most common mistakes: wrong GSTIN, missing HSN code, or a GST rate that does not match the supply type. If an invoice passes portal validation but is later found to have an error (a GSTR-2B mismatch, for instance), the draft bill in your accounting system is still in draft state and can be corrected before it is posted. The vendor is notified through the portal to resubmit a corrected invoice, and the audit trail records the original submission, the rejection reason, and the corrected version — so your books and your ITC claim are both clean.

Ready to replace the vendor WhatsApp thread?

Tell us how many vendors you have and how invoices currently reach your AP team. We'll scope the portal.

A 30-minute scoping call — we'll map your current vendor invoice cycle, identify the ITC and 43B(h) exposure, and give you a clear picture of what a purpose-built portal would look like for your vendor base. From ₹39,000/year, on your own infrastructure.

Email [email protected] →

No checkout, no per-vendor pricing. Every plan routes through a consultation.