Firsts.ai

Money & Independence
All Life Firsts

Money & Independence

My First Tax Return

Usually with the first freelance, side, or self-employed incomePersonal milestoneYou, A tax authority, Possibly an accountant

General information drawn from common experience and public guidance — not medical, legal, or financial advice. For anything urgent or personal to your situation, speak with a qualified professional.

What to expect

Registration can take weeks, so the deadline that matters comes earlier than the filing date. Gathering income and expense evidence is the bulk of the effort. The bill is often larger than expected because tax and any payment-on-account arrive together.

How to prepare

  • Register early — identity and account setup can take weeks.
  • Open a separate account for self-employed income and set aside a percentage from every payment.
  • Keep invoices, receipts, and bank statements monthly rather than annually.
  • Learn which expenses are allowable in your country before guessing.

What people say

The filing deadline wasn't my problem. Getting an account set up in time was.

Reported experience, first self-assessment

I owed tax plus an advance payment on next year. That doubled the bill.

Reported experience, first self-assessment

What helps

  • A simple spreadsheet or app updated monthly.
  • Setting aside a fixed percentage of every invoice on the day it's paid.
  • An accountant for the first return, then copying their structure yourself.
  • Filing early — the numbers are the same, the panic isn't.

Do and don't

  • Do keep personal and business spending separate.
  • Don't claim expenses you can't evidence.
  • Don't ignore letters from the tax authority; penalties compound.

When to get help

  • Unopened correspondence or missed deadlines.
  • Spending tax money you've collected but not yet paid.
  • Anyone promising to make a large liability disappear.

What it costs

Set aside

Often 25–35% of self-employed income

Accountant

Modest against a mistake

Penalties

Late filing and late payment stack

Afterwards

Diary next year's deadlines and payment dates the day you file. The second return takes a fraction of the time if the records exist.

Why it matters

You start treating income as gross rather than net, and set money aside before spending it.

Set aside

Often 25–35% of self-employed income

Accountant

Modest against a mistake

Where to turn

Your national tax authority's guidance for the newly self-employed

Related firsts

Life first · general information, not professional advice