Expenses before you start invoicing
Costs before the first invoice can belong to the activity if they were for starting it and you were, or became, registered. An invoice dated before the census registration is still a census problem. The app does not move a date to hide that.
Costs of getting started
Supplies, a domain or advice to open the activity can be linked to that start if the census registration exists or comes to exist. The document is recorded with its real date and you confirm that the cost belongs to that start.
- They can belong to the activity if registration exists or follows.
- With the real document date.
- You confirm the link.
The app does not move the date
If the invoice is dated before registration, changing the day in the app does not fix the census. The date that counts is the document date. Registration is the census form, outside this entry. The expense overview is in deductible expenses.
Common questions
Can I deduct costs from before the first invoice?
They can belong to the activity if they were for starting it and you were, or became, registered. Use the document date.
Does the app change a date from before registration?
No. An invoice dated before registration is still a census problem. The app does not move the date to hide it.
Official sources
Informational text reviewed on 26 September 2026. It is not tax advice and does not replace the Spanish Tax Agency or your accountant. Deadlines, rates, and forms can change.