Custom Inventory Management Software: Features and Cost

Description

Service Custom inventory management software: stock figures you can trust

Custom inventory software records every movement of stock as a transaction, by location, batch and user, so the figure on screen matches the shelf. WavX builds inventory and warehouse systems with barcode scanning, reorder alerts and a Tally sync. A single shop with simple stock is better served by a ready product, and this page names the ones to look at.

Tell us what you need built Last updated 2 October 2026

What custom inventory software is for

Inventory software answers three questions at any moment: how much of each item you have, where it is, and what it is worth. Custom inventory software answers them using your items, your units and your locations, and it refuses the shortcuts that make stock figures drift.

The usual reason to build is that the figure on screen and the count on the shelf have stopped agreeing. That happens when stock moves in ways the current tool cannot record:

More than one godown, shop or van, with transfers between them.

Batches and expiry dates, or serial numbers that must be traced to a customer.

One item bought in cartons, stored in boxes and sold in pieces or by weight.

Material sent out for job work and returned as something else.

The same stock sold from a counter, a website and a marketplace.

Stock that belongs to someone else, such as consignment goods.

If a spreadsheet is carrying this today, the limit you reach is not size. Google Sheets allows up to 20 million cells per spreadsheet as of October 2026, and an Excel worksheet holds 1,048,576 rows. The limit is that a sheet stores a quantity that anyone can overwrite, instead of a list of movements that add up to it. The page on outgrowing Excel covers the signs.

What a custom inventory system contains

Module

What it does

Why it matters

Item master

One record per item: code, variants, units and conversions, HSN code, tax rate, reorder level

Every report is only as good as this list

Stock ledger

Every receipt, issue, transfer and adjustment stored as a dated entry with a user

Quantity is calculated from entries, never typed in

Purchase and goods receipt

Purchase orders, receipt against the order, short and excess handling

Stock enters the system at the gate, not when the bill arrives

Sales, picking and dispatch

Reserve stock on order, pick list by location, dispatch note

Stops two salespeople promising the same carton

Locations and transfers

Stock by godown, rack or van; transfers with in-transit status

You know what is on the road

Batch, expiry and serial tracking

First-expiry-first-out picking; trace a serial number to a customer

Recalls and warranty claims take minutes

Barcode and QR scanning

Scan at receipt, pick and count using a handheld scanner or a phone

Removes typing, which removes most errors

Reorder and alerts

Low-stock, near-expiry and dead-stock alerts by WhatsApp or email

Purchasing acts on a list, not a feeling

Stock audit

Cycle counts by section, variance report, approved adjustments

Differences are found monthly, not at year end

Returns and damage

Customer returns, vendor returns, write-offs with a reason

Shrinkage has a name and a number

Reports

Valuation, ageing, fast and slow movers, movement by item

The owner sees money tied up in stock

Integrations

Tally, billing or POS, online store, shipping

One stock figure across every system

GST and Tally: what to settle first

E-way bills. Under Rule 138 of the CGST Rules, a registered person who causes movement of goods of consignment value above ₹50,000 has to furnish the consignment details in Part A of an e-way bill, with transport details in Part B. That includes movement for reasons other than a sale, so a transfer between your own godowns can need one. The dispatch and transfer screens should capture what the e-way bill asks for.

E-invoicing. E-invoicing applies to taxpayers with aggregate turnover exceeding ₹5 crore, and has done since 1 August 2023. If the inventory system raises the invoice, it has to report it and print the reference number. If billing stays in another product, the inventory system only needs to hand over the dispatch details.

HSN codes and tax rates. These belong on the item, once, so that every document picks them up. Your chartered accountant should confirm the codes before the item master is imported.

Tally. In most builds the inventory system owns quantities and movements, and Tally keeps the accounts. TallyPrime exchanges data with other applications in XML and JSON, and can be read over ODBC for reporting. The decision that matters is which system is the master for the item list, because two item masters with different names is how reconciliation work begins. See the Tally integration page.

What to decide before building

Units and conversions. How each item is bought, stored and sold. Fix this before anything else.

Valuation method. Ask your accountant which method the books use, so the stock value in the system matches the balance sheet.

Negative stock. Whether the system may let a sale go through when stock shows zero. Allowing it keeps the counter moving; blocking it keeps the figures honest.

Who can adjust stock. Adjustments need a reason and an approver, or they become the new way to hide a loss.

Barcodes. Use the manufacturer's codes where they exist, and print your own labels for loose or repacked items.

The opening count. Pick a date, count everything, and start the ledger from that count. There is no shortcut.

Connectivity in the godown. If the signal is weak, scanning screens must work offline and sync later.

Billing. Whether invoices are raised in this system, in Tally, or at a POS counter.

How WavX builds it

WavX builds inventory and warehouse management systems as web applications, with a mobile app for scanning and counting where the work happens away from a desk. The usual stack is React or Next.js, Node.js or Python and PostgreSQL, hosted in a cloud account your company owns.

The build starts from the stock ledger, because every other screen is a way of writing to it or reading from it. The order after that is receipt, dispatch, transfers, then counts and reports. Scanning is tested in your own godown with your own labels before it is called finished, since lighting, label quality and signal decide whether staff use it.

Role-based access and an audit log are part of every build. You own the source code and intellectual property. A warehouse with zones, put-away rules and pick routes is a larger system; how to build a warehouse management system describes that scope.

What it costs: a planning range

The figures below are worked from the model behind the software cost estimator . They are planning ranges for budgeting, not quotes.

Scope

Model inputs

Subtotal

Planning range

Stock tool for one location

Internal tool base ₹2,00,000 + auth and roles ₹60,000 + exports and reporting ₹50,000

₹3,10,000

₹2,63,500 to ₹3,87,500

Multi-location inventory system with a Tally sync

Custom web application base ₹4,50,000 + auth and roles ₹60,000 + third-party integrations ₹60,000 + exports and reporting ₹50,000

₹6,20,000

₹5,27,000 to ₹7,75,000

The same system with a scanning app for phones

Above + companion mobile app ₹2,00,000

₹8,20,000

₹6,97,000 to ₹10,25,000

Assumptions: standard design, small scale, and the model's spread of 15% below to 25% above the subtotal. Select the same options in the estimator to reproduce the figures.

Not in these figures: scanners, label printers and other hardware, hosting, the opening stock count, and data cleaning beyond a straightforward import. After launch, plan for maintenance of 15% to 25% of the build cost per year, the band published in the maintenance cost guide .

The existing guide on how to build an inventory management system prints its own figures and goes through the features one by one.

Timeline

The cost model places the single-location tool in its 6 to 10 week band, and both larger scopes, with subtotals above ₹6,00,000, in its 10 to 16 week band.

Two things outside the code set the go-live date: the item master being clean, and the opening count being done. Both are your team's work, and both are worth starting before development does.

When an off-the-shelf product is the better choice

Your situation

Look at first

Why

One shop or godown, simple items, billing and stock together

Vyapar, TallyPrime

Vyapar is GST billing software for small businesses with inventory, e-invoice and e-way bill features. TallyPrime includes inventory control alongside accounting.

Several warehouses, batches or serial numbers, standard flows

Zoho Inventory

Built for Indian businesses, with multi-warehouse stock, serial and batch tracking, barcode scanning, e-way bills and delivery challans, and a free plan to start

Most sales come from marketplaces and your own online store

Unicommerce

A platform for order processing, warehouse and inventory management across e-commerce channels

You already run an ERP

Its inventory module

A second stock system beside an ERP creates the reconciliation problem you are trying to remove

Product descriptions are as each vendor states them in October 2026. If you have not left spreadsheets yet, how to manage inventory without Excel compares the options at each size.

Build custom when the way your stock moves is the unusual part: job work, repacking, mixed units, consignment, or rules about which batch may go to which customer. A product will handle the ordinary movements well and leave those to a spreadsheet beside it, which is where the errors return.

Inventory software is one part of custom software and business systems at WavX.

Frequently asked questions

How much does custom inventory management software cost?

The WavX cost model gives a planning range of about ₹2.6 lakh to ₹3.9 lakh for a single-location stock tool, about ₹5.3 lakh to ₹7.8 lakh for a multi-location system with a Tally sync, and about ₹7 lakh to ₹10.3 lakh when a scanning app for phones is added. These are planning ranges from the software cost estimator on this site, not quotes.

Can it work with barcode scanners and phones?

Yes. Handheld USB and Bluetooth scanners behave like a keyboard, so they work with a web screen. A phone camera can scan too, through a mobile app or a mobile web page. We decide between them by how many scans a person does in a shift and whether the godown has a reliable signal.

Will it sync with Tally?

It can. The usual split is that the inventory system owns quantities, locations and movements, and Tally owns the accounts. Sales and purchase entries are pushed to Tally so the accountant does not enter them twice. TallyPrime exchanges data with other applications in XML and JSON.

We sell on our website and on marketplaces. Can stock update everywhere?

Yes, if each channel offers an API or a supported connector. The inventory system becomes the single stock figure and pushes available quantity to each channel. If selling across marketplaces is most of your business, a product built for that, such as Unicommerce, may fit better than a custom build.

How long does it take to build?

The cost model puts a single-location tool in its 6 to 10 week band and a multi-location system in its 10 to 16 week band. The opening stock count and item master clean-up are your side of the work and often decide the real go-live date.

Sources

Electronic Way Bill in GST: Rule 138, consignment value above ₹50,000, Part A and Part B (CBIC) · read 2 October 2026

Notification No. 10/2023-Central Tax: e-invoicing for aggregate turnover exceeding ₹5 crore from 1 August 2023 (GST Council) · read 2 October 2026

Integration with TallyPrime: XML, JSON, ODBC and TDL (Tally Solutions) · read 2 October 2026

Files you can store in Google Drive: Google Sheets size limit (Google) · read 2 October 2026

Excel specifications and limits (Microsoft) · read 2 October 2026

Zoho Inventory for India (Zoho) · read 2 October 2026

TallyPrime product page (Tally Solutions) · read 2 October 2026

Vyapar home page (Vyapar) · read 2 October 2026

Unicommerce home page (Unicommerce) · read 2 October 2026

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