This question has a short answer that surprises people: tax law sets no minimum contribution to a self invested personal pension. There is a maximum that attracts relief, and it is enforced strictly, but nothing obliges you to pay in any particular amount. The minimum you will actually run into is commercial, set by the provider whose account you are opening.
Where the minimum comes from
Providers set minimums to make small accounts worth administering. A platform may ask for a monthly direct debit above a set figure, or a single lump sum to open, or both, and the numbers differ substantially between a low cost platform aimed at fund investors and a full SIPP built to hold commercial property. Because it is a commercial rule rather than a legal one, it also changes without any change in the law, so the figure to rely on is the one in the provider's current terms rather than one quoted anywhere else.
The limits that are set in law
They run the other way. GOV.UK states that the annual allowance is the most that can be saved into pension pots in a tax year before tax is due, at 60,000 pounds, counting contributions from you, your employer and anyone else across every scheme. Separately, HMRC limits tax relief on your own contributions to 100 percent of your earnings in the year. For a director on a small salary the second is usually the binding constraint on personal contributions, while employer contributions from the company are not measured against earnings in the same way.
Why a small regular amount can still be the right start
Where a provider's minimum is low, a modest monthly contribution started early does more work than a larger one started late, because the years compound and cannot be bought back. It also establishes the account, which matters for carrying forward unused allowance from earlier years, since that generally depends on having been a scheme member at the time. Opening early with a small amount is a different decision from funding heavily, and the two are often confused.
What to confirm before opening
Ask the provider for the minimum initial payment, the minimum regular payment, whether the account can be left dormant without penalty, and what the charge is in a year when nothing is paid in. Those four answers decide whether a small account is viable there. This site does not recommend a provider and does not advise on contribution levels, which depend on facts about your income and your company that it does not hold.
Questions people ask about minimum SIPP contribution
Is there a legal minimum SIPP contribution?
No. Tax law sets maximum amounts that receive relief but imposes no minimum. Any minimum you encounter comes from the provider's own commercial terms, which is why it differs between platforms and can change without any change in the rules.
What is the maximum I can pay in?
GOV.UK sets the annual allowance at 60,000 pounds across all your pensions in a tax year, including employer contributions. Separately, relief on your own contributions is limited to 100 percent of your earnings, which for a director on a small salary is usually the tighter of the two.
Can I stop and restart contributions?
Generally yes, since nothing obliges you to keep paying. What matters is the provider's terms: check whether a dormant account still attracts the full annual charge and whether restarting triggers any minimum again. Those are commercial questions and the answers differ by platform.
Does a small pot get charged proportionally more?
Usually yes where the provider charges a flat annual fee, because the same pounds are a larger share of a small pot. A capped percentage charge tends to suit smaller balances and a flat fee suits larger ones, which is why the cheapest provider depends on the size of the account.