IR35 Inside vs Outside in 2026: The Real Take-Home Gap

Quick answer

Outside IR35 you keep more of your fee in 2026/27 because your limited company can pay you a small salary plus dividends and claim genuine expenses. Inside IR35 the same fee is taxed broadly like employment income through PAYE, with most expenses disallowed, so your take-home is lower. The gap depends on your day rate, expenses and pension plans.

What IR35 actually decides

IR35 -- the off-payroll working rules -- does not change how much your client pays. It changes how that money is taxed once it reaches you. The single question HMRC asks is whether, stripping away the limited company, the working relationship looks like employment or genuine self-employment.

If the engagement looks like employment, you are inside IR35 and the income is taxed broadly like a salary. If it looks like genuine business-to-business work, you are outside IR35 and you keep the flexibility of running a company.

Status is decided contract by contract, based on the real working pattern -- control, substitution, mutuality of obligation and how integrated you are into the client. A well-worded contract helps, but only if the day-to-day reality matches it.

Who decides in 2026

For medium and large private-sector clients, and for every public-sector client, the end client makes the determination and must give you a Status Determination Statement explaining its reasoning. The fee-payer, often the agency, then deducts tax on inside contracts.

Only when your client is a small private-sector business does your own company stay responsible for assessing IR35 and applying it. Always insist on the determination in writing and read the reasoning, because you can dispute a blanket or careless decision.

How each route is taxed in 2026/27

The figures below use the 2026/27 tax year (6 April 2026 to 5 April 2027) for England, Wales and Northern Ireland. Scottish taxpayers have different Income Tax bands and should adjust accordingly.

Outside IR35: salary plus dividends

Your company invoices the client, pays Corporation Tax on its profit (19 percent up to GBP 50,000 of profit, 25 percent above GBP 250,000, with marginal relief between), and then you extract money. The classic efficient mix is:

• A modest salary, often around the level that protects your State Pension record while keeping employer National Insurance low. Employer NI is 15 percent on earnings above GBP 5,000.
• Dividends for the rest, taxed after Corporation Tax at 10.75 percent (basic band), 35.75 percent (higher band) and 39.35 percent (additional band) for 2026/27, after a GBP 500 dividend allowance. Dividends carry no National Insurance.

You can also claim genuine business expenses and make employer pension contributions from company profit, both of which reduce the Corporation Tax bill.

Inside IR35: taxed like employment

For an inside engagement, the fee-payer calculates a deemed payment and runs it through PAYE. The income faces:

• Income Tax at 20 percent (gross 12,571 to 50,270), 40 percent (50,271 to 125,140) and 45 percent above 125,140, after the GBP 12,570 Personal Allowance.
• Employee National Insurance (Class 1) at 8 percent between GBP 12,570 and GBP 50,270, then 2 percent above.
• Employer NI of 15 percent above GBP 5,000, which is typically funded out of your assignment rate rather than added on top.

Crucially, most contract expenses you could claim outside IR35 are disallowed inside, because you are treated as an employee for that work.

A like-for-like comparison

The headline is straightforward: outside IR35 gives you more levers. You control the salary-dividend split, you claim expenses, and your company can retain or invest profit. Inside IR35 removes almost all of those levers and taxes the fee like a wage.

Why the 2026/27 gap is narrower

The outside-IR35 advantage has shrunk in recent years and shrinks again for 2026/27. Two changes matter most:

1. Dividend tax rates rose two points to 10.75, 35.75 and 39.35 percent, so extracting profit as dividends costs more than it used to.
2. The dividend allowance is only GBP 500, so very little dividend income is tax-free.

Dividends still escape National Insurance, which keeps the salary-plus-dividends route ahead for most outside contractors. But for lower day rates, the after-tax difference between inside and outside can be modest once you account for company running costs and accountancy fees.

Watch the 60 percent band and the assignment rate

Two traps catch contractors regardless of status.

First, the Personal Allowance taper: it is withdrawn by GBP 1 for every GBP 2 of income above GBP 100,000 and reaches zero at GBP 125,140. Inside this range your effective marginal rate is about 60 percent. High day-rate contractors can blunt this with pension contributions, where the GBP 60,000 Annual Allowance gives plenty of headroom.

Second, the assignment rate confusion inside IR35. The rate an agency quotes for an inside role often has to cover employer NI of 15 percent and any apprenticeship levy before PAYE even begins. A GBP 600 per day inside rate is not the same as GBP 600 per day of taxable salary. Always ask whether the rate is the assignment rate or the deemed gross pay.

Estimating your own numbers

There is no substitute for modelling your specific rate. A sensible process:

1. Take your annual contract value (day rate times expected billable days).
2. For the inside route, treat it broadly as employment income and run it through a take-home calculator, remembering employer NI may come out first.
3. For the outside route, model Corporation Tax on profit, then a small salary plus dividends.

Pair that with the corporation tax and dividend tax tools to compare the outside route fairly:

Pensions deserve special attention. Both routes can route money into a pension highly efficiently -- employer contributions reduce company profit outside IR35, and a fee-payer can often contribute from your gross assignment rate inside IR35, before income tax and NI. With a GBP 60,000 Annual Allowance, a large pension contribution can dramatically close the inside-versus-outside gap for higher earners.

A worked principle (not a quote)

Imagine a contractor billing the same annual value either way. Outside IR35, the order of taxation is: company profit, Corporation Tax, then a salary-and-dividend split where dividends avoid NI. Inside IR35, the order is: deemed employment payment, employer NI carved out, then Income Tax and employee NI, with expenses largely gone.

Because dividends skip National Insurance and expenses survive, the outside route generally lands higher. But the precise figure swings with your salary level, expense profile and pension contributions, which is exactly why a calculator beats a rule of thumb.

So which should you choose?

You rarely "choose" status -- the working reality and the client's determination decide it. What you can do is:

• Push back on careless blanket determinations with evidence of genuine self-employment.
• Quantify the real take-home difference for any role before accepting it, treating an inside rate as worth less than the same outside rate.
• Use pension contributions to recover much of the tax efficiency lost inside IR35.
• Keep your company structure flexible if your pipeline mixes inside and outside work.

Outside IR35 remains the more tax-efficient position in 2026/27 for most contractors, but the advantage is smaller than it once was, and at lower rates it can be marginal. Model the numbers, get the determination in writing, and take professional advice when the sums are large. This article is general information, not personal tax advice.