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🧾 Estimate Tax Set-Aside as You Earn

Build the calculator you keep rebuilding in a spreadsheet, then put it on a link anyone can use. These prompts turn a formula into a working app: clean inputs, a result people trust, a saved record of every calculation, and an assistant that explains what the number means. Useful on your own desk, and useful in public as the page that brings people to you.
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Estimate Tax Set-Aside as You Earn

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Every year my tax bill is a shock. Build me a tax set-aside calculator. Keep the tax bands, rates, allowances and any contribution thresholds as editable records I maintain, since these change and I do not want them hard-coded. Let me log income received and deductible business costs as they happen. Work out estimated taxable profit for the year to date, the estimated liability, and the percentage of each payment I should be setting aside. Track what I have actually put into the tax pot against what I should have, and show the shortfall or surplus clearly. Add an AI agent that explains my current position in plain language and warns me early when the pot is drifting behind, telling me what percentage to set aside from here to catch up. Automate a scheduled monthly check with a reminder to move money across, and an alert when the shortfall passes a threshold I set. Put a clear notice that this is an estimate for planning and not tax advice, and that an accountant should confirm the figures. Two logins: me, and an accountant who can view but not edit.

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01 / Spark - intelligence awakens

Estimate Tax Set-Aside as You Earn

Work out what percentage of each payment to set aside, track the pot against target, and flag a shortfall early.

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// the spark catches · intelligence awakens · the answer unfolds

The self-employed tax bill is only frightening because nobody sets money aside monthly. This works out the percentage and tracks whether the pot is where it should be.

What's Included

  • A set-aside percentage worked out from your own bands and allowances.
  • A running pot balance against what you should have saved.
  • Deductible costs counted so you are not saving against gross.
  • An assistant that flags a shortfall while it is still small.

How To Use

  1. Set money aside on every payment received, not monthly from what is left.
  2. Record deductible costs as you go. Reconstructing them later loses money.
  3. Keep the pot separate from working cash or it will be spent.
  4. Check the shortfall monthly. A small gap now is a crisis later.

Track the income behind it with personal finance prompts, and reconcile with invoicing prompts.

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