For many migrants, indefinite leave to remain (ILR) is the culmination of years spent living and working in the UK. By the time an applicant becomes eligible for settlement, they may have established a career, built a family and satisfied the residence requirements of their immigration route. only to discover that a historic criminal conviction could place their application at risk.
For an applicant with a criminal history, the suitability assessment begins with the conviction but does not end there. The Immigration Rules distinguish between circumstances where an application must be refused and those in which the Home Office retains discretion. Understanding that distinction is often the starting point for assessing whether an ILR application can realistically succeed.
Criminality and the suitability requirements
Part Suitability applies to most routes under the Immigration Rules, although some routes have their own or additional suitability requirements. The provisions engaged will therefore depend on the particular route and application being considered.
The criminality provisions distinguish between mandatory and discretionary grounds for refusal. This means that the existence of a conviction, by itself, does not provide a complete answer to the question of whether an applicant can obtain settlement.
The nature of the offending, the sentence imposed and the applicant’s wider criminal history may all be relevant. In some cases, the Rules leave no scope for discretion. In others, the Home Office must decide whether refusal is appropriate in the circumstances of the individual case.
When is refusal mandatory?
Under paragraph SUI 5.1, an application for entry clearance or permission must be refused where the applicant has been convicted of an offence in the UK or overseas and has received a custodial or suspended sentence of 12 months or more. Mandatory refusal also arises where the applicant is a persistent offender who shows a particular disregard for the law, or has committed an offence or offences which caused serious harm.
The inclusion of suspended sentences of 12 months or more is a relatively recent development. From 26 March 2026, these sentences were brought within the mandatory criminality provisions.
The practical significance is clear. An applicant may have strong ties to the UK and otherwise meet the requirements for settlement, but where they fall within a mandatory ground for refusal, the Rules require refusal, subject to any relevant route-specific provisions or other legal considerations.
This is why the precise details of the offending matter. A general description such as “a historic conviction” may conceal the issue that is legally decisive: the sentence imposed and the way in which the conviction falls to be considered under the Immigration Rules.
When does discretion become important?
Not every conviction falls within the mandatory grounds.
Under paragraph SUI 5.3, an application may be refused where the applicant has received a custodial or suspended sentence of less than 12 months, a non-custodial sentence, or an out-of-court disposal recorded on their criminal record.
For applicants falling within these provisions, the case does not necessarily end with the sentence imposed. The question becomes whether the Home Office should exercise its discretion to refuse.
The Home Office’s criminality guidance requires an assessment of the individual circumstances. Relevant factors may include the nature and seriousness of the offending, the circumstances in which it occurred, the passage of time, whether there has been further offending and the applicant’s conduct since the offence.
A single conviction from many years ago may therefore require a very different assessment from recent or repeated offending. However, the passage of time does not automatically make a conviction irrelevant. The facts of the individual case remain important.
Why the details matter before applying for ILR
For an applicant with a criminal history, the suitability assessment should take place before the ILR application is prepared.
This may require more than asking whether the applicant has “a criminal record”. It would be necessary to obtain the details of the conviction, sentencing documentation and details of any cautions, non-custodial sentences or out-of-court disposals. Overseas convictions may also need to be considered.
The wider history can then be examined:
- Was the offence isolated, or does it form part of a pattern of offending?
- Has there been further criminality?
- How long has passed since the offence?
- What evidence is available regarding the applicant’s conduct and rehabilitation?
These questions may determine not only whether an application is likely to face refusal, but also how it should be prepared and what evidence should be provided to the Home Office.
The importance of an early assessment
A criminal conviction should not automatically be treated as the end of an applicant’s prospects of settlement. Equally, an applicant should not assume that a historic conviction is irrelevant simply because they have since spent several years lawfully resident in the UK.
The first task is to identify how the offending is treated under the current Immigration Rules and the particular settlement route. It is then necessary to establish whether the case falls within a mandatory ground for refusal or whether the Home Office retains discretion.
For applicants approaching eligibility for ILR, obtaining and reviewing the relevant criminal records at an early stage can be critical. The precise nature of the offending, the sentence imposed and the applicant’s subsequent conduct may all affect both the prospects of an application and the evidence required to support it. In ILR applications involving criminality, the conviction is rarely the only question. The more important question is what legal consequence that conviction has under the
