Car Care Products Payment Fees in New Zealand: Their Effect on Margin

What a Payment Fee Actually Includes

A payment fee is the cost of moving a customer’s payment through the provider, not the cost of fulfilling the order. Separate the percentage fee from the fixed charge: the first is calculated as a share of the transaction value, while the second is a set amount applied to a payment. Record each separately so you can see how order value affects the fee rate.

Also identify currency conversion costs when the customer pays in one currency and settlement occurs in another. Other disclosed payment costs may include payment-method, gateway, platform or account charges, depending on the provider’s published pricing. Keep these distinct from shipping, GST, product cost and advertising. GST in New Zealand is charged at a rate of 15% (Inland Revenue (Te Tari Taake), GST); it is tax treatment, not a payment-processing fee. For a like-for-like comparison, use the same order value, currency and payment method across providers (Source: Inland Revenue (Te Tari Taake)).

Why Low-Value Orders Feel the Fixed Charge

The worked example shows why low-value car care orders feel the fixed charge more sharply. The fixed component is the same amount whether the customer buys a small bottle of product or a larger basket. On the smaller NZD order, that charge therefore represents a larger share of the payment fee and removes more of the order’s margin. On the larger order in the example, the fixed amount is spread across more sales value, so its relative impact falls.

The percentage component behaves differently: it rises as the order value rises. A larger basket pays more in percentage fees in absolute terms, but the rate remains tied to the value processed. This distinction matters when comparing products or promotions. A low-priced item may look profitable before payment costs, yet lose a disproportionate amount after the fixed charge. Use the fixed-fee impact when reviewing minimum order values, bundles and small baskets; use the percentage impact when assessing higher-value orders and revenue mix. Review both against realized order economics rather than revenue alone.

Reading the Worked Margin Example

Read the worked calculation from left to right. Start with the order value: this is the customer’s transaction amount before the payment cost is deducted. Apply the percentage fee to that value, then add the fixed fee. The result is the total payment cost for that order. The percentage component grows with order value; the fixed component does not, so both must remain visible rather than being treated as one rate.

The final line shows what remains after the payment cost is taken from the margin available in the example. It is not the same as revenue: revenue is the order value, while remaining margin is what is left after the payment charge and the other costs already included in the calculation. Check each step in order: order value, percentage fee, fixed fee, total payment cost, then remaining margin. For your own store, a profit margin calculator can help separate the fee calculation from product cost and other operating costs.

Refunds, Chargebacks and Currency Conversion

A refund and a chargeback are not necessarily the same fee event. A provider’s documented terms should state whether the original percentage fee is returned, whether the fixed component is retained, and whether a separate chargeback fee applies. Do not assume that refunding a $120 car-care order restores every cent of its payment cost. A chargeback may also remove the sale while adding a dispute fee; the exact treatment depends on the provider, payment method and dispute outcome.

Non-NZD transactions create a separate comparison question. If a customer pays in AUD, USD or another currency, check the documented conversion rate, conversion fee or spread, and the currency in which settlement occurs. A displayed NZD price does not prove that no conversion cost applies: the customer’s card issuer, payment provider, or both may convert the transaction. Confirm each charge in the provider agreement and settlement report rather than treating an assumed percentage as fact.

For margin analysis, track refund value against revenue and review chargebacks separately. ORVX reports return rate by units and refund value against revenue, while keeping each merchant’s trading currency separate rather than mixing currencies in one figure.

A Fair Way to Compare Payment Providers

Compare payment providers against the same transaction set, not a headline rate. Use identical car care orders at low, typical and high values, all expressed in NZD. Apply the same payment-method mix, such as cards, wallets and bank-based payments, to every provider. If a provider settles in another currency, record the conversion assumption separately rather than combining currencies.

Keep the refund assumption fixed. For example, model no refunds for the base case, then run a second case using the same refund rate and timing for every provider. State whether the comparison uses the fee recorded when a payment is captured or the cash ultimately settled into the bank account. The latter should also identify any documented payout, conversion or timing effects.

Report the result per order and across the same sales volume. This prevents a provider with a different settlement process or payment mix from appearing cheaper simply because the inputs changed.

Turning Fee Differences into Margin Decisions

Use contribution margin to decide what to change, not the payment fee in isolation. For each order, subtract product cost, discounts, payment cost and other variable fulfilment costs from the amount collected. A $2 fee may be acceptable on an order producing $18 of contribution, but problematic on one producing $1. Review the full order economics before changing checkout rules.

Review a minimum order value when small orders remain weak after all variable costs. Review bundles when combining products increases contribution more than the added discount, packaging and fulfilment cost. Review payment-method availability when a lower fee could reduce completed orders, or a higher-fee method may increase profitable conversion; compare contribution per completed order, not fee percentage alone.

Review pricing when contribution is weak across otherwise viable orders. Test the price change at the product or collection level and measure realised revenue, units, returns and contribution afterward. ORVX can report where a price experiment is worth running, but it cannot estimate price elasticity or predict how demand will respond. Its profit margin calculator can help model the arithmetic before changing an offer.

For a New Zealand car care products store, payment cost is an order-level margin input, not just a provider headline rate. Compare percentage charges, fixed fees, refunds, chargebacks and currency treatment on the same order assumptions, then use the result alongside product, fulfilment and acquisition costs before changing prices or payment options.