Ask how to get money out of a defined contribution pension and you'll usually hear one answer. Take your 25% tax-free, then draw the rest as taxable income.

It sounds like one decision. But there are two different ways to do it, and they treat that 25% very differently.

One route pays your tax-free cash in slices, attached to every withdrawal. The other pays it up front and makes everything after it taxable. The route you pick decides when your tax-free cash arrives, which tax year the taxable part lands in, and how much you can keep paying into a pension afterwards.

The two routes are the uncrystallised funds pension lump sum (UFPLS) and flexi-access drawdown. Both apply to defined contribution pots, such as a SIPP (Self-Invested Personal Pension) or most modern workplace pensions. This post explains how each one works, what each costs in tax, and where they differ.

How UFPLS works

A UFPLS takes money straight from the part of your pension you haven't touched yet, known as the "uncrystallised" part. Each payment is split automatically: 25% tax-free, 75% taxed as income at your marginal rate in the tax year you take it.

• Take £20,000 as a UFPLS and £5,000 is tax-free, while £15,000 is added to your taxable income for the year.
• Anything you leave in the pot stays uncrystallised and invested, and keeps its own 25% tax-free share.
• Each tax-free slice counts against your Lump Sum Allowance, which is £268,275 in 2026/27 across all your pensions combined. Once that's used up, further withdrawals are fully taxable.

When you combine a UFPLS with the Personal Allowance, one number is worth knowing. With no other income, you can withdraw £16,760 in 2026/27 without paying any tax. £4,190 is the tax-free quarter, and the remaining £12,570 fits exactly inside your Personal Allowance.

The catch is that you can't change the split. You can't take the tax-free part now and leave the taxable part for later. Every UFPLS puts 75% of itself on your tax bill for that year.

Not every scheme offers it, either. Providers don't have to offer UFPLS or drawdown, and some workplace schemes offer one but not the other. Which options you have depends partly on where your pension is held.

How flexi-access drawdown works

Drawdown separates the tax-free cash from the income. When you move money into drawdown (known as crystallising it), you can take up to 25% of that amount as a tax-free lump sum, often called the pension commencement lump sum. The other 75% goes into a drawdown account, stays invested, and is only taxed when you take it out.

• Crystallise £100,000 and you can take £25,000 tax-free straight away.
• The remaining £75,000 stays in drawdown. You could take nothing this year, £12,570 next year and £40,000 the year after, with each amount taxed in the year you take it.
• You don't have to crystallise the whole pot at once. Moving it across in stages, known as phased drawdown, pays out tax-free cash in instalments as well.

That flexibility is the main appeal. Drawdown lets you choose the size and timing of your tax-free cash and your taxable income separately.

There's a trade-off, though. Once money is crystallised, its 25% is fixed at whatever the pot was worth on that day, and any later growth in the drawdown account is taxable when you take it out. Uncrystallised money keeps a 25% tax-free share of whatever it's worth when you take it. That value could be higher or lower, because investments can fall as well as rise.

The same pension, taken both ways

Consider Fiona, 58, in England. She has £320,000 across a SIPP and a workplace pension, she still works part-time on a £45,000 salary, and she wants £30,000 this year to renovate her kitchen.

She has two ways to get the money.

• Route A, UFPLS: she takes a £30,000 UFPLS. £7,500 is tax-free, and £22,500 is added to her £45,000 salary.
• Route B, drawdown: she crystallises £120,000, takes the £30,000 tax-free lump sum, and leaves the other £90,000 invested in drawdown without taking any income from it.

Where does the £7,946 come from? Fiona's salary already uses her Personal Allowance and most of the basic-rate band. The first £5,270 of the taxable £22,500 fills the rest of the basic-rate band at 20%, which is £1,054. The remaining £17,230 is taxed at the 40% higher rate, which is £6,892.

On these assumptions, the modelled difference is £7,946 in a single tax year. It's based on 2026/27 bands for England, Wales and Northern Ireland (rates differ in Scotland), and it's the final bill once everything is settled. In practice, the first UFPLS is often taxed on an emergency code and the overpayment is reclaimed later. We cover that in our post on emergency tax on your first pension withdrawal.

But Route B isn't free. It uses £30,000 of her Lump Sum Allowance instead of £7,500, and the £90,000 now in drawdown has used up its tax-free share. Every pound of it, and any growth on top, will be taxed when she eventually takes it.

The saving comes from timing. Route A adds taxable income to a year when her salary has already filled the lower bands, while Route B leaves that taxable money for a later year when she may have less other income. Optiml UK is being built to run this kind of year-by-year comparison across a whole retirement, not just a single withdrawal.

The MPAA: both routes trigger it, at different moments

The Money Purchase Annual Allowance (MPAA) is the other big difference, and it's easy to miss when you're only thinking about the tax on the withdrawal itself.

Normally you (and your employer) can pay up to £60,000 a year into pensions with tax relief. Once you access a defined contribution pension flexibly, that limit falls to £10,000 a year for money purchase contributions, and it stays at that level permanently.

• UFPLS triggers the MPAA as soon as you take your first one, however small.
• Drawdown triggers it when you take your first taxable income. Taking only the tax-free lump sum doesn't trigger it.

For Fiona, that matters more than the one-year tax bill. She's still working and still receiving employer contributions. Route A would cap all her future contributions at £10,000 a year. Route B keeps the full £60,000 Annual Allowance, as long as she doesn't take any income from the £90,000 in drawdown.

We cover the knock-on effects in more detail in our post on the £10,000 MPAA trap. In short, if you're still paying into a pension, it matters which route you use first.

When each route tends to suit

Neither route is better in every case. It depends on what else is happening in your finances at the time. The patterns below are common, but your own numbers decide it.

UFPLS tends to suit people who:

• Have stopped working and have little other taxable income, so the taxable 75% falls within the Personal Allowance or basic-rate band.
• Want occasional withdrawals, each with its own tax-free slice.
• Want the untouched part of the pot to keep its 25% tax-free share on future growth.
• Don't plan to pay much more into a defined contribution pension.
• Have a scheme that offers UFPLS but not drawdown.

Drawdown tends to suit people who:

• Need a larger lump sum in a year when their other income is already high.
• Are still contributing and want to keep the full Annual Allowance.
• Want to set their taxable income year by year, for example using their Personal Allowance in the years before the State Pension starts.
• Want to use their tax-free cash for something specific, such as paying off a mortgage, without taking any taxable income yet.

Many people end up using both. They might take a UFPLS from a small workplace pot, use phased drawdown on a SIPP, and choose the timing of each around their salary, their State Pension and their spending. Whether to take your tax-free lump sum early is a separate decision, and we cover it in its own post.

The real question is when the tax lands

With the same pot and the same allowances, both routes usually give you the same tax-free cash in total. What changes is when the tax-free cash arrives, which tax year the taxable part falls into, and whether you can keep building your pension afterwards.

You can only see that properly year by year, alongside your salary, your ISAs (Individual Savings Accounts), your State Pension and your tax bands. Looking at one withdrawal on its own misses it.

That's exactly the problem Optiml UK is being built to solve. When it launches in the UK, Optiml will model each pension withdrawal against the rest of your income, show which tax year it falls into, and show when the MPAA would start to apply, all before you take a penny. Optiml is coming to the UK, and the waitlist is the way to be first in line.

Choosing between UFPLS and drawdown isn't about finding the cheaper option. It's about when the tax lands.