Drawings Versus Profit for a GP Partner: Why They Differ and How to Reserve for Tax

A GP partner usually draws a steady amount each month, often the same figure for years at a time. But you are not taxed on what you draw. You are taxed on your full allocated profit share, whether or not you took it as cash. That single fact creates the most common cash-flow surprise in partnership: a tax bill that is bigger than the money that actually landed in your account. This page is the practical, cash-flow-first treatment of that gap. It explains why drawings and profit diverge, the timing mismatch it creates, and a workable method for reserving so the January and July bills never come as a shock.

This is a "how to keep money back" page rather than a tax-law explainer. For the full partnership tax framework (the returns, the bands, capital accounts and the goodwill rules) see the GP partnership tax complete guide, which states the "taxed on profit not drawings" rule as one point among many. For how your profit share is decided in the first place, see GP partnership profit sharing and tax planning. And to see where drawings and profit actually sit in the accounts, the reading GP partnership accounts page shows you the current account. This page is dedicated to the one issue those pages only touch: the reserving method behind it.

Drawings and Profit Share Are Two Different Things

Drawings are the regular, usually monthly, cash you take from the practice during the year. They are set against an anticipated profit share and trued up at the year end. Profit share is your allocated slice of the practice's taxable profit under the partnership deed. The core rule, stated up front, is this: you are taxed on your profit share, not on your drawings.

The mechanics make the point concrete. The partnership files one partnership return (the SA800). Your allocated share flows to the partnership pages (the SA104) of your own self assessment return and is taxed as self-employed trading income, with Class 4 National Insurance on top. Nowhere in that chain does your drawings figure decide your tax. The drawings are just the cash you happened to take; the profit share is the number HMRC taxes.

It is worth pausing on why partnerships are set up this way at all. A partnership is transparent for tax: the partnership itself pays nothing, and the profit is taxed in the partners' hands instead. That is convenient in many ways, but it has one awkward consequence built in. The thing you are taxed on (your slice of the practice's profit) and the thing you receive (your drawings) are decided by two different processes, on two different timetables. The profit is fixed by the year-end accounts; the drawings are fixed by a standing decision the partners made about how much to pay themselves each month. There is no rule forcing the two to match, and in a healthy practice they usually do not. Understanding that the divergence is normal, not a sign that something has gone wrong, is the first step to managing it calmly.

Why the Two Figures Diverge

If drawings and profit were always the same, there would be no problem. In practice they rarely are, for three reasons.

Drawings Are Deliberately Conservative

Most practices set drawings below expected profit on purpose, to protect working capital and avoid having to ask partners to repay overdrawings later. So even in an ordinary year, profit tends to accumulate undrawn in your current account, while you are still taxed on the full allocated share. The cash you see is, by design, less than the profit you are taxed on.

A Strong (or Weak) Practice Year

If profit comes in above the drawings rate, you owe tax on profit you have not taken as cash, and the gap widens. If drawings ran ahead of profit (a weak year, or drawings set too high), you may have to repay the excess and your current account can go overdrawn. The reading the accounts page shows how both outcomes are recorded on your current account.

Deductions Taken at Source

NHS pension (superannuation) contributions, and sometimes tax, are deducted from the practice before drawings reach you. That widens the gap between the headline profit allocated to you and the cash you actually see, and it is one more reason the figure in your bank statement is not the figure you are taxed on. A partner who looks only at the cash arriving in their account is, in effect, looking at profit after several deductions have already been taken, and then still has to fund the rest of their tax bill on top of that. The cash figure flatters the position, which is precisely why so many partners under-reserve.

The Cash-Flow Gap and the Self Assessment Timetable

The gap would matter less if the tax fell due as the profit was earned. It does not. Profit is earned across the year, the accounts are finalised after the year end, the tax return is filed, and the bill is due on 31 January following the tax year, with a second payment on account on 31 July. The lag between earning the profit and paying the tax is precisely what catches partners out.

Payments on account are two interim payments towards the next year's bill, each broadly 50% of the prior year's liability, due 31 January and 31 July. They apply where your prior-year liability exceeded £1,000 and less than 80% of your tax was collected at source. They are not an extra charge; they are instalments credited against the eventual bill, with the difference settled as a balancing payment the following January.

It helps to see the rhythm of a settled year. Suppose your tax for a year turns out higher than the prior year (a common position for a partner whose profit share is rising). On 31 January you pay the balancing payment for the year just assessed, plus your first payment on account towards the current year. On 31 July you pay your second payment on account. The following 31 January you pay any balancing payment for the current year, plus the first payment on account towards the next. Each January therefore tends to be the heavier of the two dates, because it combines a balancing payment with a payment on account, while July is a single payment on account. Reserving evenly through the year smooths both, but it is worth knowing that January is usually the larger demand so you are not caught out by the shape of it.

The First Full Year: the "Double Hit"

The harshest version of this timing falls in a new partner's first January. That January can carry the balancing payment for the year just gone plus the first payment on account towards the next year, so roughly 150% of a single year's tax can fall due at once. This is the single biggest cash-flow shock in partnership, and it is entirely predictable, which is exactly why it should be reserved for from the very first drawing. The becoming a GP partner page covers the wider first-year picture; the takeaway here is to build the reserve before the bill, not after it.

The reason the first year stings so much is that a new partner has usually had little or no self assessment liability before, often having been a salaried GP taxed under PAYE with the tax already deducted at source. There was nothing to reserve for, so no reserving habit. Then, in the first full year of self-employment, the entire year's income tax and Class 4 National Insurance arrive in one balancing payment, and the payment-on-account system immediately asks for half of the next year's bill on top. A partner who treated their drawings as spendable income through that first year, because that is what salary felt like, can find the January demand genuinely alarming. Building the reserve from the very first month, before the habit of spending the full drawing sets in, is the single most valuable thing a new partner can do.

What You Are Reserving For

It is a mistake to reserve only for income tax. From your profit share you are funding several liabilities:

• Income tax at your marginal rate. We do not reproduce the full band table here; see the complete guide for the bands.
• Class 4 National Insurance: 6% on profits between £12,570 and £50,270, then 2% above £50,270. Note that Class 2 is no longer a required payment from 6 April 2024 for profits at or above the Small Profits Threshold, so there is no weekly Class 2 charge to budget for.
• Superannuation (NHS pension) contributions: these are tiered by your pensionable pay, and the correct tier must be paid. As a Type 1 partner your contributions are reconciled through the Annual Certificate of Pensionable Profits, so an under-deduction during the year can lead to a balancing pension payment later. We do not quote tier percentages here, because the scheme sets them and they change; confirm your current tier through PCSE and see the GP pension contributions and tax relief page.
• The annual allowance risk for higher earners: a big profit year can increase your pension growth enough to trigger a pension annual allowance charge, often settled via Scheme Pays. That is a further reserving consideration in a strong year. The NHS pension annual allowance complete guide covers it; the point here is just to keep it in view.

A Practical Method for Reserving

The good news is that reserving is a habit, not a calculation you do once. A simple, robust method has four parts.

Reserve a Proportion of Every Drawing

The most reliable discipline is to set aside a sensible proportion of each drawing as it is taken, so the tax and pension liabilities are funded as the profit is drawn. The right proportion is a planning decision modelled on your own position: your projected profit share, your marginal rate and your pension tier. It is not a fixed rate that applies to everyone, and a percentage that is right for one partner can be badly wrong for another, so resist the temptation to copy a number from a colleague.

Use a Separate Tax Reserve Account

Keep the reserve in a separate account, out of your everyday personal account and out of the practice current account, so it cannot be accidentally spent. Top it up every time you take drawings. A reserve you can see growing alongside the liability it is meant to meet is far easier to trust than money you intend to "find" in January.

Reconcile to the Accounts and the Tax Computation

Once the accounts and the tax computation are finalised, compare your reserve to the actual liability. If you over-reserved, you have a buffer; if you under-reserved, you know to adjust your drawings or your reserve rate for the next year. The reading the accounts page helps you read the figures, and the GP tax return page covers the filing.

Build a Working-Capital Buffer Too

Separately from the tax reserve, partners also benefit from a personal buffer for the practice's own cash-flow dips, such as delayed reimbursements or a spike in locum costs. Keeping that buffer distinct from the tax reserve stops one being raided to cover the other. The wider personal cash-flow picture is covered on the GP financial planning page.

One more refinement makes the method noticeably easier to live with: set the reserve up as a standing transfer rather than a manual one. If a fixed amount moves into the reserve account automatically each time drawings land, the discipline no longer depends on you remembering to do it in a busy month. Many partners find that automating the transfer is the difference between a reserve that quietly builds all year and one that never quite gets funded. The exact amount can be reviewed once or twice a year as your profit projection firms up, but the principle of "money leaves for the reserve before it can be spent" is what keeps the bills painless.

Worked Illustration

The following figures are illustrative only and do not represent any real practice or recommended reserve rate; your own figures will differ. Suppose a partner is projected an allocated profit share of £120,000 for the year and takes drawings of £100,000, leaving £20,000 of undrawn profit in the practice. On an illustrative basis their income tax and Class 4 National Insurance for the year work out to, say, £38,000, before any pension reconciliation. If they had reserved nothing, that £38,000 would need finding in January from the £100,000 of cash they had already largely spent on living costs.

Instead, suppose they set aside a portion of each monthly drawing into a separate reserve account through the year. The reserve meets the £38,000 income tax and Class 4 bill comfortably, and the January payment then splits into the balancing payment plus the first payment on account towards the next year. The proportion they set aside was worked through for this illustration only; it is not a rate to copy, because the right figure depends on each partner's profit, marginal position and pension tier. The lesson is the discipline, not the number.

Now change one variable to see why the reserve has to flex. Suppose the next year the practice has a strong year and the same partner's allocated profit share rises to £150,000, while their drawings stay at £100,000 because the partners did not change the standing rate. The partner now has £50,000 of undrawn profit, and a tax and Class 4 bill that is materially larger than the prior year, even though the cash reaching their account did not move at all. A reserve rate fixed to the previous year's smaller bill would fall short. This is exactly why reserving cannot be set once and forgotten: the cash you receive can be flat while the tax you owe climbs, and only a reserve that tracks the profit projection keeps pace. Again, the figures here are illustrative and are not a recommended rate.

Common Drawings-and-Reserving Mistakes

• Treating drawings as the taxable figure, and so under-reserving against the larger profit share.
• Spending undrawn profit that is really earmarked for tax, because it looks like spare cash in the current account.
• Forgetting the first-year payments-on-account double hit and being caught short that first January.
• Ignoring the superannuation balancing payment that can follow a Type 1 certificate reconciliation.
• Not adjusting drawings or the reserve when profit, the pension tier or the tax bill changes.
• Running no separate reserve account, so the money is never truly set aside.

How Profit Swings Land Immediately Under the Tax-Year Basis

One structural point makes reserving even more important than it used to be. Since the move to the tax-year basis, profit variations are taxed in the year they arise, so a strong or weak year feeds straight through to that year's tax. Your reserve therefore needs to flex from year to year rather than being set once and forgotten. The mechanics of the tax-year basis, the transition year and overlap relief are covered in full on the basis period reform page; here it is enough to know that profit swings now bite immediately, so the reserve should move with them.

There is also a transitional wrinkle worth flagging for partners who were trading before the reform. Some partners are still picking up a slice of transition profit in their current tax bills, spread across several years, on top of their ordinary profit share. That additional slice is real taxable profit and it needs reserving for just like the rest, even though it does not correspond to any extra cash drawn. If you are unsure whether you still have transition profit feeding into your current liability, that is a specific question to put to your accountant, because it changes the size of the reserve you need this year and next. The basis period reform page sets out how the spreading works and which years it falls in.

How We Help GP Partners

We help GP partners turn the drawings-versus-profit gap from an annual surprise into a managed routine. That means modelling a reserve rate from each partner's projected share, marginal position and pension tier (rather than a one-size-fits-all percentage), reconciling it to the finalised accounts each year, and flagging the strong-year risks such as a pension annual allowance charge before they land. The goal is simple: no January or July bill should ever be a shock. You can read more about how we support GPs on the for GPs page, or get in touch to talk through your own reserving. The wider GP tax and accounts category collects our related guides.

This guide is general information and not advice for your specific circumstances.