Read-only, by design.

Tarn can see your balances and transactions. It can never move money, and it never sees your bank login. Here is how the rest of your data is looked after.

Where your data goes, and where it can’t.

Four stops, each with one job. Money only ever moves inside your bank, never through Tarn.

The practices behind it.

What we do today, written plainly. Your IT team can ask for the detail behind any of it.

See every sign-in and export.

Owners get a full activity log: who signed in, from where, what they changed and what left the workspace.

2-step

Authenticator app or security key, for every role.

Sessions

Sign out a lost laptop from Settings in one click.

12 months

Activity history kept, exportable at any time.

For your accountant or IT team.

For your accountant or IT team.

Doing a vendor review? Tell us what you need and we will send the documents, usually within two working days.

Security overview

Our controls in eight pages

Data processing agreement

Ready to sign

Subprocessor list

Who handles what, and where

Your questionnaire

We fill in your own format

Documents you need

Your next eighteen months, mapped.

Connect a bank in ten minutes and see this year’s tight weeks before lunch.

Cash-flow forecasting for small and mid-size businesses.

The Tarn letter: one cash-flow idea a month

© 2026 Tarn Software Ltd

Read-only bank access · Data encrypted at rest

tarn

Your next eighteen months, mapped.

Connect a bank in ten minutes and see this year’s tight weeks before lunch.

Cash-flow forecasting for small and mid-size businesses.

The Tarn letter: one cash-flow idea a month

© 2026 Tarn Software Ltd

Read-only bank access · Data encrypted at rest

tarn

Your next eighteen months, mapped.

Connect a bank in ten minutes and see this year’s tight weeks before lunch.

Cash-flow forecasting for small and mid-size businesses.

The Tarn letter: one cash-flow idea a month

© 2026 Tarn Software Ltd

Read-only bank access · Data encrypted at rest

tarn

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