Terms of Service
Effective November 9, 2026
These terms are the agreement between you and Irrational Optimism LLC ("we", "us") for using IO Ledger. We've written them to be read, not skimmed past. By creating an account or using IO Ledger, you agree to them.
1. What IO Ledger is
IO Ledger is online accounting software for small businesses: bookkeeping, invoicing, bills, bank feeds, payments and reports. You use it to keep your own books. We provide the software; you decide what goes into it.
2. Your account and the people you invite
- You must be at least 18 and able to agree to these terms for yourself or for the business you sign up for. If you sign up for a business, you confirm you have authority to bind it.
- Keep your login private. You are responsible for activity under your login and for the people you invite into your companies, and for the access level you give them (owner, admin, accountant, bookkeeper or viewer).
- Tell us right away at support@irrational-optimism.com if you think someone has gotten into your account.
3. Free trial, plans and billing
- New companies get a 30-day free trial with every feature. No card is needed to start. If you don’t choose a plan by the end of the trial, the company becomes read-only. Your data is kept, and you can still view and export it.
- Paid plans are billed monthly or yearly, in advance, and renew automatically until you cancel. Optional add-on modules are billed the same way.
- You can cancel any time from Settings → Billing. Cancellation takes effect at the end of the period you have already paid for. We don’t give refunds for partial periods, except where the law requires it.
- We will give you at least 30 days’ notice by email before any price increase takes effect on your plan.
- Coupons and promotional prices apply only as described when you redeem them. They have no cash value.
- Payments are processed by Stripe. We never see or store your full card number.
4. Your data belongs to you
Everything you put into IO Ledger (your books, transactions, customers, vendors, documents and reports) is yours. You give us permission to store, process and display it only so that we can run the service for you, keep it safe, and support you when you ask.
- We never sell your data, and we never use it for advertising.
- We don’t look at your company’s books unless you ask us to help, or we need to in order to keep the service secure or meet a legal obligation.
- How we protect it is described on our Security page, and what we collect is set out in our Privacy Policy.
5. Payments, bank feeds and other connected services
Some features connect to services run by other companies. Card and bank payments are handled by Stripe, and bank and credit-card feeds by Plaid. When you turn these features on, you also agree to that provider’s terms. IO Ledger is not a bank, does not hold your money, and does not move funds itself. We aren’t responsible for outages or errors on another company’s systems, but we will help you sort out anything that goes wrong.
6. Software, not professional advice
IO Ledger helps you keep accurate books. It is not accounting, tax, legal or financial advice. You are responsible for reviewing your records, for your tax filings and for your business decisions. Reports, suggested categories and information read from uploaded documents are tools to help you; check them before you rely on them, and talk with your accountant about anything you aren’t sure of.
7. Acceptable use
Don’t use IO Ledger to break the law, to defraud anyone, to send spam, to access other people’s data, to probe or attack our systems, or to resell the service without our written permission. We may suspend accounts that do. If we do, we will tell you why where we lawfully can, and give you a chance to export your data.
8. Security, backups and restoring data
We take protecting your books seriously. That covers database-level separation between companies, encryption, an audit trail that cannot be edited, period locks and automatic backups. The details are on our Security page, and we will keep that page up to date as our practices improve.
If data is lost or changed by mistake, contact us. We will work with you to restore it from the audit trail or from our backups. Backups are a safety net, not a substitute for your own records, so we encourage you to export your key reports regularly, especially after you file.
9. Canceling and closing your account
- You can export your reports at any time. On request we will give you a full export of a company’s records in standard file formats (CSV or Excel), whether or not you are still subscribed.
- After a subscription ends, we keep the company’s data for 90 days so you can come back or export it. After that we delete it, unless you ask us to delete it sooner (email support@irrational-optimism.com) or the law requires us to keep it. Deleted data rolls out of our backups within the next 7 days.
10. Availability and changes to the service
We work hard to keep IO Ledger available and correct, but no online service is perfect. There may be maintenance windows or occasional outages. We may improve, change or retire features over time. If we ever stop offering the service entirely, we will give you at least 60 days’ notice and a way to export your data.
11. Warranty disclaimer
Except as these terms expressly say, IO Ledger is provided “as is” and “as available”, without warranties of any kind, express or implied, including merchantability, fitness for a particular purpose and non-infringement, to the fullest extent the law allows.
12. Limitation of liability
To the fullest extent the law allows, neither you nor we will be liable to the other for indirect, incidental, special, consequential or punitive damages, or for lost profits or revenue. Each side’s total liability under these terms is limited to the amount you paid us for IO Ledger in the 12 months before the claim arose. These limits don’t apply to your payment obligations, or to liability that the law does not allow to be limited.
13. Indemnity
If someone brings a claim against us because of the data you put into IO Ledger, or because you used it in violation of these terms or the law, you agree to cover our reasonable costs of dealing with that claim.
14. Changes to these terms
We may update these terms. If a change is material, we will email account owners at least 30 days before it takes effect. If you keep using IO Ledger after a change takes effect, you accept the updated terms.
15. Governing law
These terms are governed by the laws of the Commonwealth of Pennsylvania, without regard to its conflict-of-law rules. Disputes will be resolved in the state or federal courts located in Pennsylvania, and both sides consent to their jurisdiction.
16. Contact
Irrational Optimism LLC · support@irrational-optimism.com