Financial statements show Harmoney lost $14.2 million in its first year of operation.
It generated $8.6m in revenue in the year.
In 18 months of operation, it has raised $30 million in working capital, assessed more than $2 billion in loan applications and faciliated more than $275 million in lending.
Across its portfolio, it now offers investors an 11.85 per cent average annual return. Since it started operating, just over 5.6 per cent of the money invested in the platform has been lost through loan defaults.
In the year to March 31, Harmoney's biggest expense was $8.1 million on marketing. Another $6.3 million went on employee costs and $2.1 million on information technology expenses.
It is believed that the company is in the testing stages of setting up its business in Australia. It is also facing Commerce Commission-brought charges over claims it misled consumers with claims they were "pre-approved".
Claire Matthews, a banking expert at Massey University, said a loss in itself was not concerning. But she said there was a risk that Harmoney could be growing too fast.
"If they're looking to set up in Australia already I'm sure they've got really good reasons but there is an argument for consolidation before expanding."
She said Australia would be a bigger market for Harmoney, which would offer it more potential for expansion.
Harmoney's lending in New Zealand has been dominated by institutional backers. While returns for investors have been good, it has been criticised for not offering borrowers rates that were significantly cheaper than banks'.