Written by the TaxTune Editorial Team · Reviewed by our qualified accountants · Updated for 2026
The quick answer The costliest dividend mistakes are paying a dividend with no available profit, having no board minute or voucher, forgetting the tax lands in January, and ignoring how large dividends interact with the £100,000 allowance taper. Each is avoidable with the right process.

The mistakes that cost the most

  1. Paying with no profit. A dividend must come from retained profit after corporation tax. Without it, the payment is unlawful and HMRC can treat it as salary or a loan, both costlier.
  2. No paperwork. Every dividend needs a board minute and a dividend voucher. Missing them undermines the whole arrangement.
  3. Forgetting the January tax. Dividend tax is not deducted at source, so set money aside for the Self Assessment bill.
  4. Ignoring the £100,000 taper. Large dividends can strip the personal allowance and push the effective rate up sharply.
  5. Treating drawings as dividends after the fact. Taking money through the year and calling it a dividend later invites an overdrawn loan account and a tax charge.

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Frequently asked questions

What is the most common dividend mistake?

Paying a dividend when there is not enough retained profit after corporation tax to cover it. That makes the dividend unlawful, and HMRC can reclassify it as salary or a loan.

Do I need paperwork for dividends?

Yes. Each dividend needs a board minute recording the decision and a dividend voucher for each shareholder. Without them the arrangement is hard to defend.

When do I pay tax on dividends?

Through Self Assessment, by 31 January. Dividend tax is not deducted at source, so set money aside during the year for the bill.

Can I pay a dividend if the company has no profit?

No. It must come from retained profit after corporation tax. Paying without sufficient reserves is unlawful and can be reclassified by HMRC.

How do large dividends affect my tax?

Once total income passes £100,000, the personal allowance is gradually withdrawn, so large dividends can push your effective tax rate up sharply. Planning the amount and timing helps.