Simple Inventory Management for NZ Small Businesses (No Enterprise Pricing)

The Problem With Inventory Management Advice

Most guides on inventory management are written for retailers with warehouses, multiple locations, and dedicated stock controllers. If you're a small NZ business — a boutique, a trades supplier, a food producer, a gift shop — that advice isn't written for you.

This guide is.

We'll cover every realistic option for inventory management for NZ small businesses: free spreadsheet approaches, local SaaS tools, Xero add-ons, Shopify's built-in system, and the cases where a simple custom tool built for your exact workflow is the best move.

Option 1: The Spreadsheet (Free, But You'll Pay in Other Ways)

Let's start where most small businesses start — Google Sheets or Excel.

A spreadsheet works when:

• You have fewer than 100 SKUs
• One person manages stock
• You don't sell through multiple channels
• You're not importing or dealing with multi-currency suppliers

The cost is zero. The hidden cost is time and errors.

The problems that creep in:

• Someone edits the wrong cell and your stock counts are wrong for weeks
• There's no audit trail — you can't see who changed what or when
• Reorder reminders don't exist unless you build them yourself with conditional formatting
• GST tracking requires extra columns and manual discipline
• Importing goods from overseas? You're manually calculating landed costs with a calculator

Spreadsheets aren't inherently bad. They're just fragile at scale. If you're growing — or if a stock error would cost you a customer — it's time to look at something more robust.

Option 2: Dedicated Inventory SaaS (The NZ-Focused Options)

New Zealand has a strong ecosystem of inventory tools, several of which were built with NZ businesses specifically in mind.

DEAR Inventory (now Cin7 Core)

DEAR Inventory rebranded under the Cin7 umbrella as Cin7 Core. It's popular with NZ product businesses because it handles:

• Purchase orders, sales orders, and fulfillment in one place
• Multi-currency purchasing (important if you're buying from Australia, China, or the US)
• GST tracking built in, not bolted on
• Integration with Xero, Shopify, WooCommerce, and Amazon
• Batch and serial number tracking (useful for food, health products, or anything with expiry dates)

Pricing: Starts around NZD $349–$499/month for small business tiers. That's a meaningful ongoing cost for a business turning over $500k or less.

Best for: Product businesses with 200+ SKUs, multiple sales channels, or import/export requirements.

Cin7 Omni

The more powerful sibling — Cin7 Omni is designed for businesses that need 3PL (third-party logistics), EDI connections, or advanced warehouse management.

For most NZ small businesses, Cin7 Omni is overkill and priced accordingly ($700+/month). If you're thinking about it, you probably already have a dedicated ops person.

Unleashed

Unleashed is a New Zealand company (founded in Auckland) and remains a popular choice for NZ manufacturers and wholesalers.

Strong points:

• Excellent for businesses that make products (bill of materials, production runs)
• Strong NZ and AU GST/tax support
• Real-time inventory visibility across locations
• Good Xero integration — it's one of the better-regarded Xero add-ons in the NZ market

Pricing: From around NZD $400–$600/month depending on users and features.

Best for: Manufacturers, food producers, or wholesalers with production workflows.

The honest verdict on these tools

They're genuinely good products. If your business has 500+ SKUs, you're importing containers, or you manage multiple warehouse locations — the monthly cost is justified.

But if you have 80 products, sell through one channel, and mainly need to know "how many do I have and when do I need to order more" — paying $400/month for a system you'll use 20% of feels wrong.

Option 3: Shopify Inventory (If You're Already Selling There)

If your business runs through Shopify, you already have inventory management built in — and it's better than most people realise.

Shopify tracks stock levels per variant (colour, size, etc.), sends low-stock notifications, and handles inventory across multiple sales channels if you're using Shopify Markets or selling in-person with Shopify POS.

What Shopify inventory does well:

• Automatic stock decrement on every sale
• Inventory history and adjustments log
• Works across online + physical store (POS) without extra software
• Integrates with Xero via the Shopify-Xero connector for GST reconciliation

What it doesn't do:

• Purchase order management (you'll need an app for that)
• Supplier management or landed cost tracking for imports
• Bill of materials for manufactured products

For a NZ retailer selling finished goods through Shopify only, the built-in tools often cover 80% of needs. Add Stocky (free Shopify app) for basic purchase order management and you might have everything you need for under $50/month total.

Option 4: Xero Inventory and Add-Ons

Xero has basic inventory tracking built into its standard plan — it tracks quantities and cost of goods, and integrates with your invoicing. For a business with a small, stable product catalogue, this is often enough.

Xero's limitations:

• No reorder point alerts
• No purchase order workflow
• No multi-location support
• No batch/serial tracking

For anything beyond basic stock counting, Xero's marketplace has add-ons: DEAR/Cin7 Core and Unleashed are the main ones, but also Katana (for manufacturers) and inFlow for smaller operations.

The Xero add-on trap: You end up paying Xero ($80+/month) plus an inventory add-on ($200–$500/month) for a combined cost that starts to rival a full ERP. Make sure you're actually using the capabilities before committing.

Option 5: A Simple Custom Tool (When $399 Beats $399/month)

Here's the option most guides don't mention — because most guides aren't written by people who build custom software.

There's a category of NZ small business where a lightweight custom inventory tool makes more sense than any of the above:

You're a good fit if:

• You have fewer than 500 SKUs
• Your products don't change frequently
• Your workflow is specific — maybe you track by job, batch, or customer order rather than SKU
• You need GST-inclusive pricing and supplier tracking but nothing more
• You're currently using a spreadsheet and losing time to errors

A custom tool built for your exact workflow — not a generic system you have to adapt to — can solve the specific problem without the monthly subscription cost.

What a custom inventory tool from BestAI looks like:

• Web-based, works on any device (phone, tablet, desktop)
• Your products, your categories, your supplier names
• Stock levels with low-stock alerts to your email or phone
• Simple purchase order tracking — record when you ordered, how much, from whom
• GST-inclusive or exclusive pricing, correctly calculated for NZ requirements
• Landed cost tracking for imports (add freight, customs duty, and get your true cost per unit)
• No features you don't need. No monthly bill.

Cost: From $399, delivered in 48 hours.

Ongoing cost: Nothing, unless you want changes.

NZ-Specific Considerations

Regardless of which tool you choose, make sure it handles these correctly for New Zealand businesses:

GST Tracking

New Zealand's 15% GST rate needs to be handled consistently. The tool should let you record supplier invoices as GST-inclusive or exclusive, track the GST component separately, and make reconciliation with your Xero (or MYOB) accounts straightforward. The last thing you want is a stock system that makes your quarterly GST return harder.

Supplier Management and Import Costs

Many NZ small businesses source products from overseas — Australia, China, the US, or Europe. Your inventory tool should let you record:

• Supplier currency and exchange rate at time of purchase
• Freight costs (by sea or air)
• Customs duty and MPI biosecurity levies where applicable
• Delivery time so you can plan reorders around shipping lead times

If you're importing goods through MPI-cleared channels, keeping a record of supplier documentation against each batch is also good practice — custom tools can include this; off-the-shelf tools often don't.

NZ Supplier Relationships

Unlike large markets, NZ has a relatively small supplier ecosystem. Many businesses have 3–10 core suppliers they've worked with for years. A simple supplier management view — contact details, typical lead times, payment terms — is often more useful than a fully automated procurement module.

When Enterprise Tools Actually Make Sense

To be straight with you: if your business has 2,000+ SKUs, multiple warehouses, staff picking orders, or you're running B2B with complex pricing tiers — Cin7, Unleashed, or a full ERP is the right answer. The monthly cost is justified by the operational complexity it manages.

Also, if you're already integrated into a wholesale or retail supply chain that requires EDI connections (large supermarkets, retail chains), you need a system that speaks those standards. Custom lightweight tools don't do EDI.

The goal isn't to sell you a cheap option. It's to match the right tool to your actual situation.

The Decision Framework

What to Do Next

If you're managing inventory management for a small NZ business and none of the off-the-shelf options feel quite right — or you're paying for a system you barely use — it's worth a conversation.

We build simple, focused inventory tools for NZ small businesses from $399. The conversation is free, and we'll tell you honestly if one of the SaaS options above is a better fit.

• See our custom software service — how it works, what's included, real examples
• Book a free 45-minute chat — describe your situation, we'll tell you what makes sense

No obligation. No sales pressure. We'd rather point you to the right tool — even if it's not us.

BestAI builds custom inventory and business tools for NZ small businesses. From $399, delivered in 48 hours. Book a free chat or browse our case studies.