When you are planning to relocate internationally for study or work, calculating your personal financial requirements is only half the battle. If you plan to bring your family, the financial equation changes dramatically.
To a visa officer, a “Dependent Visa” is a high-scrutiny category. Immigration departments must be absolutely certain that your family will not rely on public funds or fall into financial distress after arrival. Because of this, they require you to demonstrate a separate, highly specific dependent maintenance pool.
If you fail to calculate this pool correctly, or if you accidentally let your savings dip below the combined family threshold for even a single day, your entire family’s visa applications will be rejected.
Using the United Kingdom’s strict student visa framework as our primary case study, this guide breaks down the legal formulas, the upfront costs, and the exact step-by-step math required to safely document your family’s maintenance pool.
1. The Core Legal Formula: How Much Do You Need to Show?
When applying for a UK Student Dependent Visa, the government requires you to demonstrate a set monthly allowance for each dependent (your spouse and each child) for up to a maximum of 9 months.
The exact amount required depends entirely on the location of your primary place of study:
- Inside London: You must prove you have £845 per month for each dependent.
- Outside London: You must prove you have £680 per month for each dependent.
The Combined Family Calculation (9-Month Maximum)
If your course of study lasts for 9 months or longer (which applies to almost all undergraduate and master’s programs), you must show the full 9-month maximum of maintenance funds upfront. This money is in addition to the main applicant’s tuition and personal maintenance funds.
| Dependent Location | Per Dependent (Monthly) | Per Dependent (9-Month Total) |
| Inside London | £845 | £7,605 |
| Outside London | £680 | £6,120 |
2. Practical Case Studies: Doing the Math
To see how these numbers stack up in the real world, let us look at two common family scenarios.
Note: In 2026, the main applicant’s maintenance requirement is £1,483 per month in London and £1,136 per month outside London.
Case Study A: A Married Couple (Main Applicant + Spouse) in London
- Main Applicant Maintenance: £1,483 × 9 months = £13,347
- Spouse Maintenance: £845 × 9 months = £7,605
- Total Maintenance Pool Required: £20,952 (plus any outstanding first-year tuition fees)
Case Study B: A Family of Three (Main Applicant + Spouse + 1 Child) Outside London
- Main Applicant Maintenance: £1,136 × 9 months = £10,224
- Spouse Maintenance: £680 × 9 months = £6,120
- Child Maintenance: £680 × 9 months = £6,120
- Total Maintenance Pool Required: £22,464 (plus any outstanding first-year tuition fees)
3. The Unforgiving 28-Day Holding Rule
Just like the main applicant’s funds, the entire combined dependent maintenance pool must be held in a regulated bank account for a minimum of 28 consecutive days.
The bank statement you submit must show that your account balance never fell below the required family total for even a single second during that 28-day window.
The Currency Volatility Threat
If your family’s savings are held in your local home currency, you must be incredibly careful with currency exchange fluctuations. The visa officer will convert your account balance into British Pounds using the official Oanda exchange rate on the exact day you click “submit” on your online application.
If your local currency devalues against the Pound during your 28-day waiting period, your total balance might accidentally slip below the required threshold. To prevent this, always hold a 10% safety buffer in your account above the minimum legal requirement.
4. Upfront Costs: Visa Fees and the Health Surcharge
The maintenance pool is simply money you must prove you have in your bank account; it is not money you pay to the government. However, you must also prepare for massive, non-refundable upfront cash payments when you submit your applications.
For every dependent you bring, you must pay:
- The Visa Application Fee: In 2026, the application fee is £558 per person. This applies to both the main applicant and each dependent.
- The Immigration Health Surcharge (IHS): This fee grants your family full access to the UK’s National Health Service (NHS). For students and their dependents, the rate is £776 per person, per year of the visa.
Total Upfront Costs for a 1-Year Master’s Degree (approx. 16-month visa)
Because a standard one-year master’s visa is usually issued with extra buffer months, you are required to pay for 1.5 to 2 years of the IHS upfront.
- Main Applicant Upfront Cost: £558 (visa) + £1,552 (IHS) = £2,110
- Per Dependent Upfront Cost: £558 (visa) + £1,552 (IHS) = £2,110
For a family of three (student, spouse, and child), you must be prepared to pay £6,330 in pure government fees before your visa is even reviewed—and this must be paid from an active operational account that is completely separate from your untouchable maintenance savings account.
5. Legally Documenting the Relationship
A large bank balance is useless if you cannot prove that your dependents are legally yours. You must provide a clear legal paper trail of your relationship:
- For Spouses: A legally registered marriage certificate. If your marriage occurred recently, you should also provide supplementary proof of a shared life, such as joint bank accounts, joint tenancy agreements, or historical family photographs.
- For Children: A full birth certificate showing the names of both parents. Note that dependent children must be under the age of 18 at the time of application.
By calculating your family’s financial thresholds early, maintaining a generous exchange-rate buffer, and keeping your visa payment fees completely separate from your core maintenance savings, you can confidently navigate the dependent visa audit and keep your family together on your international journey.