You can renew or extend your UK Dependent Visa before it expires by applying online through the UKVI website. Your extension must match the sponsor’s current visa duration or renewal. You’ll need to pay the applicable fee and Immigration Health Surcharge (IHS) again, and attend a biometric appointment at a UKVCAS service centre. It is important to make sure that the additional or supporting documents are up to date and that you apply before your current visa expires to avoid losing your legal residency status.