Synoria AI CorporationAutonomous software company
Accounting & Finance

What the late invoices are worth

A late invoice is worth more than its face value. Under the EU late payment rules it carries statutory interest and a fixed sum for recovery costs, and the Court of Justice has confirmed the fixed sum is due for EACH late invoice rather than once per customer or per contract. Ten late invoices from the same client are ten fixed sums, not one. This works out both figures per invoice, adds them up, and shows exactly what the once-per-customer reading would leave on the table.

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Accounting & Finance

Nordic and other EU or EEA businesses chasing overdue B2B invoices, and the bookkeepers who prepare the reminder.

How it works

  1. Enter the statutory rate that applies to you — the directive sets it at the reference rate plus at least eight percentage points, and the reference rate is reset twice a year.
  2. Enter the fixed sum per late invoice and the currency; both are yours because the national implementation sets them.
  3. Add each unpaid invoice with its amount and its due date.
  4. Read the claim: interest, fixed sums, and the difference between counting them per invoice and per customer.

What you gain

  • Calculates exactly what a late-paying customer owes you under EU rules — the statutory interest plus the fixed recovery sum per invoice — instead of you guessing or leaving it uncollected.

Screenshot

What the late invoices are worth

Technical details

Standard50.99 USD · 1500 requests · 31-day license · one-time payment · 31-day access
Pro101.98 USD · 6000 requests · 31-day license · one-time payment · 31-day access
Isolationdedicated instance per license
Usage meteringLLM usage metered per license
Accessweb sign-in with license key

How to set up & use

  1. Buy the license — your key (lic_...) appears on the order page and in your email.
  2. Sign in at app.synoriaai.com with your license key.
  3. No installation — the product runs in your browser, on your own isolated instance.
  4. 1. Open the page and enter the statutory interest rate for your country (it is not built in, since it changes twice a year).
  5. 2. In the 'Late invoices' section, add each overdue invoice: enter its reference, customer name, amount, and due date. The day after the due date is when it becomes late.
  6. 3. For each invoice, the fixed recovery sum is added once automatically — you can edit it if your country's law sets a different amount.
  7. 4. The page calculates statutory interest as amount × rate × days / 365, rounded once at the end, and shows the formula so you can verify it.
  8. 5. Review the total per invoice and the overall summary, then copy or note the results for your claim.

Frequently asked questions

Does the tool store my invoice data anywhere?

No. All calculations happen in your browser; nothing you enter is sent to a server or saved.

Can I claim the fixed recovery sum more than once per customer?

No — the fixed sum is counted once per late invoice, not per customer. If you have multiple late invoices from the same customer, each gets its own fixed sum.

What if my country's fixed sum or interest rate differs from the default?

Both the rate and the fixed sum are editable fields, so you can set the correct values for your jurisdiction before calculating.

With USDT or USDC stablecoins on one of the payment networks shown at checkout. You scan a QR code with the exact amount pre-filled — no card and no wallet connection is required.
The payment is detected on-chain and matched to your order by its unique amount. After confirmations complete, your license key is generated and your own product instance is prepared; the order page updates by itself.
No. You make a one-time stablecoin payment for a 31-day license with a fixed request quota. There is no auto-renewal — to keep using the product, you simply purchase again.
Each plan includes a fixed number of requests for the license period. A small overage allowance is defined beyond that; once it is used up, requests pause until a new license is purchased.
Yes. Every license runs in its own isolated instance with its own data directory — customers never share an instance or data.
On-chain payments are never lost. Keep your order number and contact support; the payment can always be matched to your order.
Each product is built for its target market and uses that market's language; this storefront is available in 9 languages.

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