Late payments cost you. Get Interestd.

Interestd puts a fair, transparent interest charge on your overdue Xero invoices, and gives late payers a reason to pay on time.

Works with Xero

Invoice

INV‑2041

42 days overdue

Invoice total: $4,820.00
Annual rate: 8.50%
Grace period: 7 days
Chargeable days: 35

Interest to charge

4,820.00 × 8.50% × 35/365

$39.29

How it works

Three steps. You stay in control of every charge.

Connect your Xero account

Secure access you can revoke at any time. Your invoices sync automatically.

Set your interest policy

Choose your rate, a grace period, and any customers or invoices to exclude. Set it once.

Review and apply

See every calculation before it goes anywhere. You approve each charge — nothing posts on its own.

Why you can trust it

Interest touches your books and your customer relationships. Interestd is built so every figure can be explained, checked, and undone.

Accurate, defensible calculation

Interestd calculates interest on outstanding balances according to your stated method and rate. The same method, every time.

A transparent breakdown

Every charge shows its working — balance, rate, chargeable days — so you can stand behind it if a customer asks.

1,250.00 × 8.50% × 21/365 = 6.11

Review before anything posts

No automatic charging, no surprise invoices in your customers' inboxes. Approval is always a deliberate action.

A full audit trail

Who approved what, when, at which rate, and which invoice it became. Nothing is hidden or implied.

Clean, one-click reversals

Changed your mind, or want to waive it as a gesture? Reverse the charge properly in your accounts, in one step.

Your data stays yours

Interestd reads only the invoice data needed to calculate interest, and you can disconnect from Xero whenever you like.

Who it's for

Anyone dealing with the cost of late payers: business owners tired of chasing invoices, and the bookkeepers and accountants who manage debtors for their clients.

Interestd does one job well. It isn't a debt-chasing platform or a full accounts-receivable suite — just a precise, fair way to recover the real cost of being paid late.

Register your interest

Interestd is in early beta with a small group of New Zealand businesses. Leave your details and we'll be in touch as places open up.

No cost, no commitment, no sales calls.