No universal spending amount establishes the classification. Evidence must explain qualifying knowledge, employment, organizations and the actual assignment.
Separate business investment from the legal test
Use genuine training costs only where relevant and supported. Do not purchase unnecessary courses simply to create a larger number for the file.
A smaller or family-run operation may need more time to assemble training and project records than a large company with existing HR systems, but that is a scheduling and preparation-cost question, not a reason to substitute a vaguer knowledge claim. Identify which company records and explanatory work the specific claim actually needs, and keep that preparation and legal review separate from government filing fees, any optional processing service, and family-related applications. The knowledge claim has to be built from internal material that nobody has previously organised: design records, commissioning reports, training documents, and an explanation of how long the company needs to develop a replacement. The useful expenditure is internal: the time of the quality and operations staff who compile investigation logs, the IT staff who can document the system integration, and the human-resources staff who can produce the training matrix and payroll history.