If you set your salary and dividend split back in April based on a profit forecast of £120,000, but your agency is now tracking towards £180,000, that original plan is already wrong. Most articles on the salary dividend split for agency founders assume a static year. They tell you the optimal split for a given profit level and leave it there. But agency profits move. Retainers get won. Projects burn scope. Margins tighten or loosen. Your tax plan needs to move with them.

This article covers exactly how to adjust your salary dividend split agency founders use when the mid-year forecast changes. We will walk through the mechanics, the tax implications, and the practical steps you need to take with your accountant.

Why the Standard Advice Falls Short for Agency Founders

The textbook advice for a UK limited company director is simple. Take a salary up to the primary NI threshold (£12,570 for 2025/26). Then take the rest as dividends. This keeps your tax and NI combined lower than a full salary would.

That works fine if your profit is predictable. But agency revenue is rarely flat. You might start the year expecting £100,000 profit and end up at £160,000. Or you might budget for £200,000 and land at £140,000 because a key retainer client left. The split that was optimal at the start of the year is now either leaving tax on the table or pushing you into an overdrawn director's loan account.

The problem is not the principle of the split. It is the timing. If you take dividends based on a forecast that later proves wrong, you can end up paying tax you could have deferred, or worse, triggering a section 455 charge on an overdrawn director's loan account.

The Mechanics: Salary First, Dividends Second

Your salary is the fixed part. Most agency founders set it at £12,570 per year, paid monthly. That keeps you inside your personal allowance for income tax and avoids both employee and employer NI above the threshold. It is a clean, efficient baseline.

Dividends are the variable part. You can only pay dividends from distributable profits (retained earnings, not future revenue). If your profit forecast changes, the amount you can safely take as dividends changes too.

Here is the rule: dividends must be covered by realised profits at the time of payment. If you pay a dividend based on a forecast that does not materialise, that dividend is technically illegal. The company must have sufficient retained profits on the date the dividend is declared. Interim dividends (paid during the year) can be based on management accounts showing a current profit position, but that position must be real, not projected.

A Worked Example

Let us say you run a 12-person digital agency billing £800,000 per year. At the start of the tax year (April 2025), you forecast a profit of £150,000. You set your salary at £12,570 and plan to take £100,000 in dividends across the year, leaving £37,470 in the company for corporation tax and reinvestment.

By September 2025, you have won two new retainers and your profit forecast has moved to £210,000. You have already taken £50,000 in dividends. You now have an extra £60,000 of distributable profit available. But you also have a higher corporation tax bill to account for.

At £210,000 profit, your corporation tax is calculated using marginal relief. The effective rate is roughly 21.5% (between the 19% small profits rate and the 25% main rate). That means your corporation tax bill is approximately £45,150. After tax, you have £164,850 left. Your salary of £12,570 is a deductible expense, so the company saves corporation tax on that too. The net distributable profit after salary and corporation tax is roughly £152,280.

You have already taken £50,000 in dividends. You could take another £102,280 across the rest of the year. But should you? That depends on your personal tax position.

Personal Tax: The Dividend Allowance and Tax Bands

For 2025/26, the dividend allowance is £500. That is the amount of dividend income you can receive tax-free. Everything above that is taxed at your marginal dividend rate: 8.75% for basic rate, 33.75% for higher rate, 39.35% for additional rate.

Your salary of £12,570 uses your full personal allowance. So every pound of dividend you take is taxable. The first £500 is at 0%. Then the next £37,200 (up to £50,270 total income) is at 8.75%. Then everything from £50,271 to £125,140 is at 33.75%.

In the example above, if you take the full £152,280 in dividends, your total income is £164,850. That puts you deep into the additional rate band. The tax on those dividends alone would be substantial. You would be better off leaving some profit in the company and taking it in a later year when your income might be lower, or when you are planning an exit and can use Business Asset Disposal Relief (BADR).

When to Adjust Mid-Year: Three Scenarios

Scenario 1: Profit is Higher Than Forecast

This is the most common situation. You budgeted conservatively, then a big project landed. Your profit is now £50,000 higher than expected.

What to do: Review your personal tax position first. If you are already in the higher rate band, taking more dividends means paying 33.75% on them. Compare that to leaving the profit in the company, where it will be taxed at 19-25% corporation tax. If you plan to reinvest that money into the agency (new hires, equipment, marketing), leaving it in the company is usually better. If you need the cash personally, take only what you need and leave the rest.

Do not automatically increase your dividend draw just because the profit is there. The tax cost of extracting it may be higher than the benefit.

Scenario 2: Profit is Lower Than Forecast

This is the dangerous one. You paid dividends based on a profit forecast that did not materialise. Now your director's loan account is overdrawn because you took more out of the company than it actually earned.

What to do: Stop taking dividends immediately. Check your management accounts to see your actual retained profit position. If you have overdrawn, you have two options. Repay the excess to the company (as a director's loan repayment) before the company year-end. Or leave it and face a section 455 charge at 33.75% on the overdrawn amount if it is not repaid within nine months of the year-end.

If you cannot repay, speak to your accountant about declaring a formal dividend based on the actual profits available. You may need to adjust the amounts you have already taken and treat the excess as a loan. This is not ideal, but it is fixable.

Scenario 3: Profit is Steady but Your Personal Circumstances Changed

Maybe your spouse stopped working, or you had a second child, or you sold a rental property. Your personal tax position has changed even though your agency profit has not. In this case, you might want to shift more income to your spouse via a dividend (if they are a shareholder) to use their personal allowance and basic rate band. Or you might want to reduce your own dividend draw to stay within a lower tax band.

This is where having a spouse as a shareholder in the agency is useful. If they hold shares, they can receive dividends up to their personal allowance and basic rate band without paying the higher rates. This is a legitimate tax planning strategy, provided the shares were issued for a genuine commercial reason (not just to avoid tax).

How to Actually Make the Adjustment

You cannot just change your salary mid-month. Your salary is set by your employment contract and processed through payroll. You can change it, but you need to inform your payroll software (Xero, FreeAgent, QuickBooks) and issue a new payslip. The change applies from the next payroll run.

Dividends are more flexible. You can declare a dividend at any time, provided the company has sufficient distributable profits. You do not need to declare dividends monthly. Many agency founders declare dividends quarterly or even annually, based on their latest management accounts.

If your profit forecast has changed, the simplest approach is:

  • Re-run your management accounts to get your current retained profit position. Use Xero or FreeAgent with a reporting tool like Spotlight Reporting or Float.
  • Calculate your revised tax position including corporation tax and your personal dividend tax.
  • Decide on a new dividend amount for the remainder of the year. This should be based on actual profits to date plus a conservative forecast for the remaining months.
  • Document the dividend declaration with a formal board minute and dividend voucher. Even for a sole director, this is important for HMRC compliance.
  • Update your payroll if you are changing your salary. This is only necessary if your original salary was set above £12,570 and you want to reduce it, or if you want to increase it to use more of your personal allowance.

Common Mistakes Agency Founders Make

Paying dividends before the profit is earned. This is the biggest risk. Dividends must come from realised profits. If you pay a dividend in June based on a forecast for December, and the profit does not arrive, you have an illegal dividend. The remedy is to treat it as a director's loan, but that creates its own tax issues.

Ignoring the director's loan account. Every pound you take out of the company that is not salary, dividend, or expense reimbursement goes through your director's loan account. If that account goes overdrawn and stays overdrawn past nine months after year-end, you pay 33.75% tax on the balance. This is a common trap for agency founders who use the company bank account like a personal account.

Not reviewing the split at least quarterly. A salary dividend split set in April is a plan, not a contract. Review it every quarter when you look at your management accounts. If the forecast has moved, adjust the dividend draw accordingly.

Forgetting the dividend allowance is only £500. For 2025/26, you get £500 of tax-free dividends. That is it. Every additional pound is taxed. Do not let the small allowance trick you into thinking dividends are tax-free. They are not, beyond that first £500.

When to Involve Your Accountant

If your profit forecast changes by more than 20% mid-year, you should speak to your accountant before taking any further dividends. The same applies if you are considering changing your salary, or if your director's loan account is overdrawn.

As ICAEW qualified accountants, we see agency founders make the same mistake every year. They set a salary dividend split in April, ignore it until January, and then discover they have either overpaid tax or created an overdrawn loan account. A 30-minute mid-year review with your accountant can save you thousands in unnecessary tax.

If your agency profit forecast has shifted, contact us to review your current position and adjust your salary dividend split before it becomes a problem.

Final Point: The Split is a Tool, Not a Rule

The salary dividend split agency founders use is a tax efficiency tool. It is not a fixed rule. When your profit forecast changes, the tool needs recalibrating. Leave the salary at £12,570. Adjust the dividend draw based on actual profits and your personal tax position. Review it quarterly. Document everything. And if you are unsure, ask your accountant before you write the cheque.

That is how you stay tax efficient, avoid penalties, and keep your agency's finances in order, even when the numbers move.