How to Use Your CoS Number for Family Applications
UK Immigration
Published: February 2, 2026 • Updated: June 15, 2026
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Elizabeth Harrington Senior UK Immigration Research Analyst

How to Use Your CoS Number for Family Applications

Bringing your family to the United Kingdom requires careful coordination during the initial immigration application process. Many professionals experience significant anxiety about ensuring their partner applications link correctly for simultaneous Home Office processing. This comprehensive guide explains exactly how you must connect these submissions using your unique reference numbers.

Understanding the Role of Your CoS in Family Visas

Your Certificate of Sponsorship serves as the foundational document for establishing your right to work locally. This digital record contains vital information about your specific employment role and salary. Dependants rely entirely on this primary approval to establish their own legal status. They must also provide a valid criminal record check when submitting their paperwork.

The primary applicant receives a unique reference number from their employer before starting the online forms. Family members utilize this exact same identifier to demonstrate their direct connection to the main worker. Without this crucial piece of information, authorities cannot process the dependent requests alongside the primary submission. You must secure your Certificate of Sponsorship details before your partner begins drafting their own application.

Five Steps to Link Applications

1

Start Main Application

The primary worker must begin their online visa application first to generate the necessary reference codes.

2

Obtain the UAN

Locate your Unique Application Number at the top of your draft or submitted government forms.

3

Start Dependent Forms

Your partner can now begin their separate dependent application on the official government portal.

4

Enter Reference Numbers

Input the primary applicant's UAN or Certificate of Sponsorship number when the system prompts you.

5

Pay and Submit

Pay the mandatory healthcare surcharges and submit both applications to ensure they are processed together.

Applying Together vs. Joining Later

Families must decide whether to submit their paperwork simultaneously or sequentially over time. Applying together ensures that all family members receive their decisions at roughly the exact same time. This synchronized approach minimizes the stressful period of separation during the initial relocation to Great Britain. The simultaneous submission method requires having all relationship evidence and financial documentation prepared well in advance.

Choosing to have your partner join you later often makes sense for complex logistical or financial reasons. The primary earner can secure housing and establish a stable local bank account. This delayed strategy allows families to spread out the substantial upfront government fees. However, the subsequent dependent application will require the main worker to provide updated proof of ongoing employment.

Main Applicant vs Dependent

CriteriaMain ApplicantDependent Partner
Visa Fees£719 to £1,751 based on durationMatches main applicant fee exactly
IHS Surcharge£1,035 per year paid upfront£1,035 per year paid upfront
Right to WorkRestricted to sponsored employer onlyNearly unrestricted work rights locally
Settlement (ILR)Eligible after 5 continuous yearsEligible after 5 continuous years

CoS Number vs. UAN: Which Do You Actually Need?

Many applicants confuse the Certificate of Sponsorship reference with the Unique Application Number during the submission process. The employer generates the first code when they formally offer you the position. The government system creates the Unique Application Number only after you begin filling out your online forms. Gathering your UK visa document checklist early prevents unnecessary confusion between these two critical identifiers. Your partner will primarily need the UAN to link their forms to yours.

The online portal specifically asks dependents to provide the primary worker's UAN to establish the family connection. Entering the employer reference code instead can cause significant administrative delays or rejections. You must carefully copy the exact alphanumeric sequence from your submitted forms to your partner's draft application. Always verify this specific identifier twice before paying the mandatory healthcare surcharges and finalizing the dependent submission.

Critical Linking Warning

Never submit a dependent application before the main applicant has started theirs and generated a UAN. Doing so breaks the digital link and can lead to immediate rejection of the family member's visa.

Meeting the Financial Maintenance Requirements

The government requires strict proof of financial stability for all incoming family members. You must demonstrate access to specific funds to ensure your dependents will not require public financial assistance. The primary applicant needs to show £1,270 in their personal bank account today. A dependent partner requires an additional £285 to meet the strict maintenance criteria. These mandatory maintenance funds must remain in your account for twenty-eight consecutive days before submitting the application.

First dependent children require £315 to satisfy the current immigration financial support rules. Any subsequent children will each need an additional £200 of proven available capital. Families must calculate these exact cumulative totals carefully to avoid immediate refusal based on insufficient financial resources. Bank statements must clearly show the required balance without dipping below the threshold. The final date on your financial evidence must fall within thirty-one days prior.

Partner Visa Document Checklist

  • Official marriage certificate or proof of two-year relationship
  • Main applicant's Unique Application Number (UAN) or CoS
  • Certified bank statements (if employer is not certifying maintenance)
  • Valid passport with sufficient blank pages for travel
  • Tuberculosis test results (if applying from a listed country)

Will Your Employer Sponsor Your Partner?

Progressive companies increasingly recognize the importance of supporting the entire family unit during international career transitions today. Some organizations will cover the substantial government fees for your spouse and children. Others might only pay for the primary worker while leaving dependents to self-fund. Understanding your total UK ICT Skilled Worker helps you negotiate a better overall compensation package before signing the contract. You must clarify these specific financial boundaries during your final salary negotiation phase.

Your employer does not issue a separate sponsorship certificate for your dependent partner. The company only needs to sponsor the main employee who possesses the required professional skills and qualifications. Dependants derive their legal right to enter the country entirely from the primary worker's approved immigration status. However, having your company certify maintenance for dependents remains a highly valuable benefit worth requesting during negotiations.

Application Do's and Don'ts

Do This

  • Do double-check the UAN format before submitting
  • Do provide strong relationship evidence spanning several years
  • Do ensure maintenance funds meet the exact required thresholds

Avoid This

  • Don't use the sponsor's license number instead of the CoS
  • Don't apply as a visitor first to switch later
  • Don't submit dependent forms before the main applicant starts

Proving Your Relationship Status

Married couples must provide their official marriage certificate to prove their genuine relationship. The document must include a certified translation if it is not in English. Unmarried partners face a slightly higher burden of proof under current immigration regulations. They must demonstrate they have lived together in a relationship for two years.

Acceptable evidence includes joint bank account statements and shared utility bills spanning years. Tenancy agreements naming both partners provide excellent proof of continuous shared residential addresses. You should gather documents from multiple official sources to build a strong case. The authorities scrutinize unmarried partner applications carefully to ensure the relationship is genuine and subsisting before approval.

Eligible Dependent Categories

Spouse or Civil Partner

Legally married partners or those in a recognized civil partnership with the main applicant.

Unmarried Partner

Couples who can prove they have lived together in a relationship for at least two years.

Child Under 18

Biological or legally adopted children under the age of 18 at the time of application.

Child Over 18

Adult children who are already in the UK as dependents and remain financially reliant.

How Long Does the Dependent Visa Take?

Standard processing times for family applications submitted from outside the country typically take around three full weeks. Submitting your paperwork simultaneously helps prevent frustrating UK dependant visa cost that often separate families during the relocation process. You can purchase priority services to accelerate the decision to just five days. Super priority processing delivers a final outcome within one single working day locally.

Each family member must pay the priority fee individually to expedite their forms. You cannot pay one single fee to rush the entire family unit simultaneously. Sometimes the primary applicant receives their approval slightly before the dependent partner does. This minor timing discrepancy remains completely normal and should not cause immediate panic.

"Dependent applicants must provide the main applicant's Unique Application Number (UAN) or Certificate of Sponsorship reference to successfully link their applications."
Home OfficeImmigration Rules Guidance

Handling Delays and Refusals

If the authorities refuse the primary worker's application, they will automatically reject all linked dependent submissions simultaneously. The family's right to enter the country depends entirely on the main applicant securing their approved status. You will lose the initial application fees but receive a full refund for the healthcare surcharge payments. Administrative reviews allow you to challenge decisions if you believe the caseworker made a clear factual error. This appeals process can take several months to reach a final conclusive resolution.

Sometimes the authorities request additional documentation to verify your ongoing genuine relationship status. You must respond to these official requests promptly within the specified legal timeframe. Failing to provide requested evidence guarantees an immediate refusal of the dependent forms. If your partner's application faces delays while yours is approved, you can travel ahead to begin working. Your approved immigration status remains completely valid regardless of what happens to your partner's pending dependent paperwork.

Practical Recap

Successfully linking your family applications requires careful attention to detail when entering your unique reference numbers online. Always wait until the primary worker generates their UAN before starting dependent forms. Gathering robust relationship evidence well in advance prevents stressful delays during the final submission phase this year. Unmarried partners must pay special attention to proving their two years of cohabitation.

Ensure you have the correct financial maintenance funds sitting in your bank account for twenty-eight consecutive days. Check whether your hiring organization has certified maintenance on your digital certificate to simplify the entire process. Double-check every single alphanumeric character when copying the UAN across to your partner's official government portal draft. Taking these precise steps ensures your family can relocate together without unnecessary complications. Proper preparation remains the absolute key to securing your successful family visa approvals.

Frequently Asked Questions

Common questions about linking family applications to your UK work visa.

Can my partner work in the UK?
Yes, dependent partners receive nearly unrestricted rights to work in the local economy. They cannot work as professional sportspersons or sports coaches under the current immigration regulations for dependent visas.
What if we get married after I get my visa?
Your new spouse can apply to join you as a dependent after your official wedding ceremony concludes. They will need to submit their application from outside the country initially today. You must provide your current UAN to link their new application to yours.
Does my employer need to issue a separate CoS for my partner?
No, your employer only issues one certificate specifically for the primary sponsored worker.
Can we use priority service for just one of us?
Yes, you can pay the expedited processing fee for the main applicant while dependents use standard processing.
How long are dependent visas valid for?
The authorities will grant your partner permission to stay for the exact same duration as your visa. Their expiration date will perfectly align with the primary worker's approved timeline to ensure synchronized family renewals.

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E

Elizabeth Harrington

Senior UK Immigration Research Analyst

Elizabeth specialises in UK visa sponsorship data analysis and labour market research. With extensive experience tracking Home Office sponsorship licensing trends, she produces in-depth statistical reports covering regional employment patterns, industry-specific sponsorship capacity, and workforce migration data across the United Kingdom.

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