Nil Returns and Your British Pension After Returning to Poland - Pitfalls and Changes from 2026

Returning to Poland after years of working in the UK and wondering whether you can keep paying National Insurance contributions to boost your British pension? It is a common question - and a common trap. Find out when paying Class 2 is legal, what changes from 6 April 2026, and what to watch out for before you trust someone who says “everyone does it”.

More and more people are returning from the United Kingdom to Poland after many years of work. Some return on a UK pension, others simply want to live more quietly and more cheaply. And that is exactly when the question arises:

Can I keep paying contributions in the UK to increase my British pension?

In theory, it sounds great. In practice… many people fall into a trap, often at the urging of “advisers” or accountants who either do not understand the rules themselves or knowingly keep quiet about important facts.

Online you can find plenty of advice along the lines of:

• “keep your business in the UK”

• “send nil returns”

• “just pay Class 2”

• “HMRC doesn’t care”

• “it’s legal”

• “everyone does it”

The problem is that HMRC increasingly does care, and usually only after a few years.

”Nil returns” and the phantom business - a very costly mistake

Many people, after moving to Poland, keep an active business in the UK purely in order to continue paying voluntary Class 2 National Insurance contributions.

Often the business no longer really exists:

• there are no clients

• there is no income

• there is no work carried out in the UK

• the person lives and works exclusively in Poland

Despite this, the accountant keeps sending HMRC so-called “nil returns”, that is, declarations showing zero income. And this is where the trouble starts: very often, after some time, HMRC decides that the business does not actually exist and closes it automatically.

The problem is that many people do not even know about it. Why?

• they do not log in to their HMRC online account

• they have an old British address

• one-time security codes (OTP) go to an inactive UK phone number

• all communication is handled by the accountant

As a result, for years the person believes they are “building up a pension”, regularly paying Class 2 contributions, while in fact the business was closed long ago.

The contributions start to “sit” on the HMRC account as an overpayment of tax or unallocated payments. And unfortunately, there are cases where a dishonest accountant can see that the business has been closed… but keeps sending nil returns and keeps charging money for the “service”. HMRC may decide that the business does not exist and close it automatically, and merely sending returns will not restore the contributions that were credited.

What about declaring the “small profits threshold” instead of nil returns?

Some accountants suggest a different solution: instead of nil income, declaring a small income, the so-called small profits threshold, purely so that HMRC does not close the business.

At first glance, it sounds clever. But does anyone then tell the client about the tax consequences?

Because if you officially declare income in the UK, that income:

• may also need to be declared in Poland

• may be subject to Polish tax residency

• may trigger an obligation to account for foreign income with the Polish tax office

And suddenly it turns out that the “clever solution” can generate additional tax obligations. We describe the consequences with the Polish tax office in more detail in our article on penalties for failing to declare foreign income.

Tax residency - the key issue many people forget

If you are returning to Poland for good:

• you live in Poland

• you work in Poland

• your centre of family and financial life is here

then in most cases you become a Polish tax resident. Poland may then expect you to account for all of your income, including foreign income. This topic is discussed in detail in our article on double taxation of income from the United Kingdom.

Merely having a business in the UK does not automatically mean you can freely choose where you pay contributions. And if you cannot freely choose where to pay contributions, where does the belief come from that you can pay in two countries at once?

Can you pay contributions in Poland and the UK at the same time?

This is probably the biggest myth circulating among emigrants.

Many people believe:

I will work in Poland, but also pay myself cheap Class 2 in the UK and I will have two pensions.

Unfortunately, the rules on social security in Europe work a little differently. The principle is that social security contributions are generally paid in one country, the one where you actually carry out your work, as follows from the guidance on social security abroad (NI38).

If it were possible to pay contributions freely in several countries at once, everyone would open businesses in multiple countries and “buy” themselves several pension systems at the same time.

That is why there are rules concerning:

• the place where the work is carried out

• residency

• certificates confirming where you are covered by social security

On GOV.UK you can find the information that a person working abroad usually pays contributions in the country where they work.

The certificate of coverage (form A1) - a very important document

In many cases, the key document is the certificate confirming which country’s social security system you are covered by, known in Poland as the A1 certificate, and in the British context as the certificate of coverage.

GOV.UK clearly indicates that the ability to pay British contributions while working abroad depends precisely on such rules and international agreements.

HMRC is changing the rules from 2026

Here we come to a change that many people have not yet heard about.

From 6 April 2026, HMRC is changing the rules on voluntary Class 2 contributions for people living abroad. GOV.UK states it plainly in its publication on the changes from 6 April 2026:

You cannot pay voluntary Class 2 National Insurance contributions for time abroad from 6 April 2026 onwards.

So from April 2026, it will no longer be possible to pay voluntary Class 2 contributions for time spent abroad under the current rules. For people who have been paying Class 2 as a way of building up a pension, this is the end of that option.

Can you legally increase your UK pension after leaving at all?

Yes, but you have to do it legally and knowingly.

In some situations, it is possible to pay voluntary National Insurance contributions after moving out of the UK. However, this depends on:

• your contribution history

• the length of your stay in the UK

• where you work

• the type of your professional activity

• your residency status

• meeting HMRC’s specific conditions

It does not work on the basis of:

I’ll keep the business and send nil returns

It is also worth remembering that HMRC today has much better data exchange than a few years ago. You can check your qualifying years before making any decision.

If you are returning to Poland - do at least these 3 things

1. Change your address with HMRC

Provide a Polish correspondence address. How to do this step by step is described in our article on changing your personal details with HMRC.

2. Change your phone number

Security codes should go to an active Polish number.

3. Check your HMRC account regularly

Do not assume that “the accountant is handling everything”. Because sometimes it turns out the business was closed several years earlier.

Most importantly: do not blindly believe assurances that “everyone does it”

In matters of pensions, contributions and taxes, mistakes often only come to light years later, and by then:

• the money may no longer be recoverable

• the contributions may not be credited

• HMRC may question the business

• the Polish tax office may ask about foreign income

So before you keep a business in the UK purely to pay cheap Class 2, it is worth checking:

• whether you are entitled to do so at all

• whether the business is genuine

• where you should actually be paying contributions

• whether the “clever solution” will turn out to be a very expensive mistake

If you are returning to Poland for good and have overpaid tax in the UK, also check whether you are entitled to a tax refund from the UK after returning to Poland.

When can you really legally pay National Insurance after leaving the UK?

This is probably the most important question in the whole topic. Because merely having an old business, sending “nil returns” or paying Class 2 National Insurance contributions does not yet mean that HMRC regards it as legally building up a pension.

GOV.UK clearly distinguishes between:

• compulsory contributions

• voluntary contributions

• and actually running a business

When can you legally pay contributions after moving away?

In practice, there are two main situations.

1. You still actually work in the UK or temporarily abroad

This applies to people who:

• still do genuine work for a British company

• are posted abroad

• work temporarily outside the UK

• run a genuine business

In such situations, you can sometimes still be covered by the British National Insurance system. What matters here is:

• where the work is carried out

• the length of your stay abroad

• certificates confirming you remain under the UK insurance system

• international agreements

2. You pay voluntary contributions to top up your qualifying years

And this is exactly what interests most people returning to Poland.

In some cases, HMRC allows you to pay voluntary National Insurance contributions even after leaving the UK, in order to increase or top up your State Pension. But you have to meet specific conditions.

What conditions do you need to meet?

On GOV.UK you can find information that what matters includes:

• how many years you lived in the UK

• whether you previously worked and paid contributions in the UK

• how long you have lived abroad

• whether you work outside the UK

• your tax and insurance status

HMRC checks individually whether a given person is entitled to pay voluntary Class 2 or voluntary Class 3.

Class 2 and Class 3 - a huge difference

Many people do not realise that these are not the same contributions.

Voluntary Class 2

This is the much cheaper option, but available only to those who meet specific conditions. Historically, it was available to some people working abroad after previously working in the UK.

Voluntary Class 3

These contributions are considerably more expensive, but available to a larger number of people wanting to top up their qualifying years towards a British pension. In practice, after the changes from 2026, most people living permanently outside the UK may lose the ability to pay the cheap Class 2 and be moved to the much more expensive Class 3.

”But I’m paying contributions - so surely everything is legal?”

This is a very common way of thinking. Many people assume: “Since HMRC accepts my money, it means everything is fine.”

Unfortunately, it does not work like that. HMRC often accepts payments automatically, before anyone has thoroughly verified the taxpayer’s situation. Only later may there be an inspection, a verification, or an automatic closure of the business.

That is why some people only discover after several years that:

• the business has been closed

• the contributions are not being credited the way they thought

• or they are sitting on the HMRC account as an overpayment

”My accountant said it’s allowed”

This sentence comes up very often. The accountant who sends the nil returns bears no responsibility for HMRC’s decisions three years down the line. You do. So do not ask “is it legal?”, ask “do you have a written tax opinion confirming this status?”.

Some accountants:

• only deal with sending returns

• do not analyse tax residency

• do not know the Polish rules

• or take no responsibility for the consequences years later

And yet these are decisions concerning your future pension, and often many thousands of pounds.

Why is HMRC closing such businesses more and more often?

Because the system has changed a great deal. Just a few years ago, many cases went through with virtually no checks. Today HMRC:

• has more automated verifications

• compares data

• analyses taxpayer activity

• sees the absence of income over many years

• sees the absence of genuine business activity

• increasingly checks people living outside the UK

If a business generates no income for a long time, shows no activity, and the person has lived outside the UK for years, HMRC may decide that the self-employment effectively no longer exists.

”But I just want to top up my pension”

And that is entirely understandable. Many people, after years of working in the UK, already have part of a British pension built up and want to increase it. Before making a decision, it is worth checking your State Pension forecast on GOV.UK.

But that is exactly why you need to distinguish between legal voluntary contributions and artificially keeping a business alive. They are not the same thing. HMRC provides legal ways to top up your qualifying years, but you have to do it by the rules.

A pension is a marathon, not a quick trick

Online, it is easy to find “clever solutions”. But a UK pension is based on qualifying years, which must be properly recognised by HMRC.

And sometimes it is better to:

• legally pay a little more

• have everything in order

• sleep soundly

than to spend several years paying “cheap Class 2” that may later be challenged.

Because the worst-case scenario looks like this: someone spends years thinking they are building up a British pension… and after a while it turns out that some of the contributions were not recognised the way they expected.

Do you have doubts about your contribution or tax situation after returning from the UK? Get in touch with us - we will help you assess whether your contributions are being credited correctly and what is worth changing before April 2026.