Or maybe not...
I just found this on the Uk.gov website.
https://www.gov.uk/minimum-wage-different-types-work/paid-an-annual-salary
This sounds more like how he gets paid.
So then, if he is salaried, we definitely can't use any of the overtime and bonuses because the employment letter doesn't state he is entitled to work overtime and earn bonuses?
The key here is the 'annual salary in equal weekly or monthly amounts' - are his payslips equal every month? Does he have a set monthly payslip? Salaried employees do not have a specified hourly wage - they are paid by the year or month only.
For example, I am a salaried employee. When I joined the company my annual salary was £18,000 per year and I was paid for 37 hours per week. My base income on my payslip was £1,500 before tax every single month, regardless of the number of hours I actually worked each week (I work shifts so my hours change all the time, but I still get paid for 37 hours per week).
On top of that monthly £1,500, I may have received expenses and weekend hours, but they were not part of my base salary of £18,000 (£1,500 per month), they were extra. I never got paid less than the minimum of £1,500.
If your husband is salaried, he will receive a fixed monthly or weekly amount, with the overtime on top. The monthly amount he should receive, based on a salary of £16,120, is:
£16,120 / 12 = £1343.33
If this is not what he receives and he is paid for the number of hours worked (which may differ each week/month), he is not salaried.
For the visa, the definitions of non-salaried and salaried employments are:
5.1.3.
Non-salaried employment includes that paid at an hourly or other rate (and the number
and/or pattern of hours required to be worked may vary) or paid an amount which varies
according to the work undertaken. Salaried employment includes that paid at a minimum
fixed rate (usually annual) which is usually subject to a contractual minimum number of
hours to be worked.