They always answer right away to any question I have, they provide clear answers, and they are very patient even when I struggle to understand. They try to explain in different ways. They are very helpful, responsive and friendly.
Accountable automatically generates a number for each new invoice. You can choose how this number is calculated so that it always follows your own numbering system.
Option | How the number is calculated | Example |
Highest number + 1 (recommended option; default) | The app takes the highest number among your documents and adds 1 to it. | Your highest number is 014: the next one will be 015. |
Last invoice + 1 | The app takes the number of the document with the most recent invoice date and adds 1 to it, even if a higher number already exists. | Your most recent invoice is number 012; the next one will be 013. |
The “Last Invoice + 1” option is useful if you have documents with numbers that differ significantly from your usual numbering system,for example, order numbers from an e-commerce platform.
Go to Settings → Invoice Settings.
Under “Automatic Invoice Numbering,” select the option that works for you. The change is saved immediately.

Go to your invoice settings.
Tap “Automatic Numbering,” then select the option that works for you.

This setting applies to both the web and mobile versions: a change made on one platform applies to the other as well.
You can enable the option to exclude imported invoices. An invoice is considered imported if it was added as a PDF, uploaded via email, or created by your accountant.
Settings > Invoice settings

When this option is enabled:
Your imported invoices retain their numbers;
however, they are no longer used to determine the next number.
This is useful if a number you see on an imported document doesn’t follow your usual format. However, the app will never suggest a number that’s already been used on an imported invoice.
This option is turned off by default. Entries from the daily income log are always taken into account.
On the web version, the number is pre-filled based on the selected option. When you click on the number field, you’ll see up to three suggestions:
“Maximum” or “Last”: the number calculated based on the selected option;
the number calculated based on the other option;
“Other”: the number generated by ignoring your imported invoices (only if the exclusion option is disabled and if this number is different).

In the mobile app, a single number is pre-filled based on the selected option.
In both cases, you can always enter your own number. The app will notify you if it already exists.
This applies only to new documents: existing numbers are never changed.
The same rule applies to your invoices, credit memos, income without invoices, and quotes, but each document type retains its own numbering system. A quote therefore never uses an invoice number.
Your format is preserved: prefixes, separators, and zeros are carried over (F-014/2026 becomes F-015/2026). If your number includes the year, the numbering resets to 001 on January 1 (2026-042 becomes 2027-001).
Drafts and invoices received via Peppol are not taken into account
Questions? We’re here for you in the chat 😊
Thank you for your feedback!
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Read moreThey always answer right away to any question I have, they provide clear answers, and they are very patient even when I struggle to understand. They try to explain in different ways. They are very helpful, responsive and friendly.
Everything was great! All my questions were answered quickly and in a friendly manner.
In the world where everyone seems to be out to get small entrepreneurs and overwhelm them with new rules, more taxes and reporting obligations, Accountable often feels like the one steady partner that actually wants you to succeed, providing quick, clear and personalised support. Thank you!
This is an amazing application with great support on issues. In short as in day I am addicted to it (in a positive way). I myself is from IT project management and the way they have captured the user requirement, it’s phenomenal.
UI is great. Feature packed and very easy to use. The team at Accountable were VERY quick to respond and their team of technicians soon had a fix in place. Very happy with the level of service so far. Thumbs up from me!
This program is a lifesaver, and it is always improving. Plus, it has an AI chat feature that is actually useful.
The coaching session on tax management was excellent, good material, excellent explanations and very insightful. Combined with the AI I never feel alone with Accountable.
The availability of your team to help and guide people to understand their finances better is what really makes Accountable valuable. While the AI is able to give answers to most basic questions, specific scenarios need counsel from a human which your team performs beautifully.
Fast and careful answers from Alina. Top service. Thank you.
They always answer for questions wherever is via direct e-mail or through app. If they can’t answer fully they will forward you to the right place. Documents were always prepared well and ready to send further to government. Everything is intuitive in the app and easy to sort out even for someone completely green in this field.