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To qualify for ILR, you must not spend more than 180 days outside the UK in any rolling 365-day period during your qualifying residency. For British citizenship, the limits are stricter still. These rules apply across a five-year window. The tracking burden starts on day one and does not stop.

Most people manage this in a spreadsheet. Some keep a rough mental count. Almost everyone reconstructs the full history at application time, working backwards through bank statements, boarding passes, and email receipts.

It is fragile. It is stressful. Years of residency, the right to remain, a citizenship application. These stakes are too high for a spreadsheet to carry.

Not sure where you stand right now? Try the free ILR eligibility calculator.

Immi was built by someone on a UK visa.

The frustration wasn't dramatic. It was quiet and persistent — a background uncertainty about whether a trip would push a rolling total over the limit, whether the count was right, whether anything would surface as a problem later. The kind of thing you push to the back of your mind but never fully put down.

A spreadsheet helped. But it required discipline to maintain, broke when trips got complicated, and gave no visibility into rolling windows. It tracked the past. It couldn't show you where you stood right now.

Immi exists to replace that uncertainty with clarity. Not legal advice. Not predictions. Just an accurate, up-to-date record of where you stand.

Immi is operated by Use Immi Ltd, a company incorporated in England and Wales.

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