Most comparisons of a payment gateway for small business NZ websites stop at the headline rate on a pricing page. That number rarely matches what actually lands in your account once GST, settlement timing and buy now pay later add-ons are counted. The gateway that suits your business depends less on which provider markets itself as cheapest and more on how you actually take payment: a one-off website sale, a deposit before a job, or a recurring invoice.

Choosing a Payment Gateway for Small Business NZ: Match It to How You Get Paid

Before comparing Stripe fees NZ against Windcave or anyone else, work out what you are actually charging customers for. A gateway that is perfect for an online shop can be the wrong fit for a trades business that only needs deposits, and vice versa.

• Retail or ecommerce checkout. You need a gateway that integrates cleanly with your cart (WooCommerce, Shopify, or a hosted checkout page) and supports one-click repeat purchases.
• Service deposits and bookings. You mostly need a simple payment link or embedded form, not a full cart, so a lighter integration keeps setup time down.
• Recurring invoices or subscriptions. You need saved card details and automatic billing, which not every gateway handles equally well.
• Trade and B2B invoicing. You may only need an occasional “pay now” button on an emailed invoice rather than a full online payment gateway built into the site.

Once you know which of these describes your business, the shortlist of gateways worth comparing gets a lot shorter.

Stripe: the Default for Most NZ Small Business Websites

Stripe is the gateway most web developers reach for first, mainly because it plugs into almost every platform without custom development. If your site runs on WordPress, Shopify or a similar platform, a Stripe integration is usually a plugin install and an API key away from working.

On current published pricing, Stripe charges around 2.65% plus 30 cents on domestic card transactions, with a higher rate for international cards. Afterpay processed through Stripe carries its own separate fee on top, usually in the 4 to 6% plus 30 cents range. None of these rates are fixed for the life of your account, so check Stripe’s current NZ pricing page before you commit rather than relying on a blog post, including this one.

Stripe suits businesses that want to get selling online quickly and do not need a local account manager. It is a weaker fit if you also take in-person card payments and want one provider handling both.

Windcave: NZ-Built and Worth It in Specific Cases

The Windcave vs Stripe question usually comes down to whether you also take payments in person. Windcave is a New Zealand company, and its real advantage is a single account that covers both an in-store EFTPOS terminal and your website checkout, with one settlement and one support line to call.

Windcave pricing typically includes a one-off setup fee, a monthly account fee, and a per-transaction rate that can undercut Stripe once your volume is high enough to justify the fixed costs. For a business doing a handful of online sales a month, those fixed fees can make Windcave more expensive overall than a gateway with no monthly charge. For a retailer or clinic that already has a Windcave terminal at the counter, adding online payments to the same account is often the simpler and cheaper route.

What Buy Now Pay Later Actually Costs You

Afterpay, and buy now pay later options like it, get pitched as a way to lift average order value by letting customers split a purchase into instalments while you get paid in full upfront. That part is accurate. What gets left out of most pitches is the fee: expect to pay roughly 4 to 6% plus a fixed fee per transaction, well above a standard card rate.

Buy now pay later fees NZ businesses pay are worth running as a simple test rather than a guess. Turn it on for a defined period, track whether average order value and conversion actually move, and compare that lift against the extra fee. If the uplift does not clear the added cost, drop it rather than keeping it on by default.

GST and the Surcharge Question

Two practical points get missed in most gateway comparisons written for a general audience rather than an NZ one.

First, GST. If your gateway provider is GST-registered in New Zealand, GST applies to the fees they charge you, and if your own business is GST-registered you can generally claim that back. Check your monthly statement for a GST breakdown rather than assuming the headline percentage is the whole story.

Second, credit card surcharge small business NZ rules are shifting. A bill proposing to ban surcharges on in-store card payments has been through Parliament’s process during 2026 but had stalled as at the time of writing, with amendments still being debated. It targets in-person payments rather than online checkout specifically, but any business planning to surcharge card payments on its website should keep an eye on where this legislation lands before building a surcharge into checkout as a permanent feature.

Setting It Up Without Slowing Down Checkout

This is the kind of detail that is easy to get wrong if payment setup is bolted onto a site after launch rather than planned as part of the website design process. The gateway you pick matters less than how cleanly it is wired into your site. A few habits keep checkout fast and keep you out of trouble:

1. Use the official plugin or integration for your platform instead of a custom-built connection, so security patches and card scheme updates happen automatically.
2. Never store card numbers on your own server or database. A proper gateway integration keeps card data off your site entirely, which is what keeps you out of PCI compliance headaches.
3. Keep the payment step on your own domain where the gateway allows it. A jarring redirect to an unfamiliar third-party page is a common point where customers abandon a purchase.
4. Test on mobile first. Most checkout traffic on an NZ small business site now comes from a phone, and a form that is fiddly to fill in on mobile costs more in lost sales than any gateway fee will.
5. Reconcile fees monthly against what actually lands in your bank account, not just the headline rate, so fee changes do not go unnoticed.

If you are weighing this up at the same time as a wider rebuild, it is worth reading alongside our breakdown of what a small business website should actually cost in NZ, since gateway fees are an ongoing cost that sits outside your initial build budget.

A Decision Checklist

• Mostly online sales, no physical store: start with Stripe for speed of setup.
• Online and in-person sales together: get a quote from Windcave alongside Stripe and compare the combined cost.
• Higher-value purchases where instalments help close the sale: trial Afterpay or a similar option for a fixed period and measure the result.
• Mostly invoicing existing clients: a simple “pay now” link may cost less than a full gateway integration.
• GST-registered: confirm how GST on fees appears on your statements before you sign up.

FAQ

Do I need a payment gateway if I only send invoices?

Not necessarily. Many accounting platforms offer a built-in “pay now” button on emailed invoices through their own payment partner, which can be cheaper and faster to set up than a full website gateway integration if you rarely take payment directly on your site.

Is Stripe or Windcave cheaper for a small NZ business?

It depends on volume. Stripe usually wins for low-volume, online-only businesses because it has no monthly fee. Windcave can work out cheaper once your transaction volume is high enough to absorb its monthly and setup costs, particularly if you are combining online and in-person payments on one account.

Do I have to offer buy now pay later?

No. It is optional, and the fee is high enough that it should earn its place through measured results rather than being switched on because competitors have it.

Can I pass the card fee on to customers?

Some businesses do, but surcharge rules in New Zealand are under active review in 2026. Check the current Commerce Commission guidance before adding a surcharge to your checkout, since the rules you build around today could change.