A new business is offered every cover at once and can afford none of them, so the useful question is order rather than completeness. Two things are decided by law and by contract and cannot wait; the rest follow the business as it acquires the things worth insuring. Buying the whole package on day one is how a start up pays for cover it does not use, and buying nothing is how it loses the first contract it wins.
Day one: what the law and the first customer decide
Employers' liability is compulsory the moment anybody is employed, and that includes a first part time helper. Motor insurance is compulsory for any vehicle used on the road, with the right use class for the work. Then comes the first customer's requirement: a landlord, a client, a marketplace or a site will name public liability at a limit, and that certificate is often the thing standing between the business and its first invoice.
As soon as somebody relies on your work
Professional indemnity becomes the priority the moment a client could lose money because of your advice, design or delivery, which for most service businesses is the first paying engagement. It is claims made, so starting it late leaves the earliest work uninsured, and starting it at the first contract is both cheaper and cleaner than backdating a retroactive date later.
As soon as you own something worth replacing
Tools, stock, equipment and a laptop belong on a property section once they exist, and household policies exclude business use, which is where a lot of new businesses discover the gap. The sum insured should be the replacement cost today rather than what was paid, and it needs revisiting as the kit grows, because a figure set in the first month is wrong by the end of the first year.
What a start up can usually defer
Business interruption matters once there are premises whose loss would stop trading. Cyber matters once you hold customer data or take payment online. Legal expenses and personal accident are worth their price and are not urgent on day one. Deferring a cover deliberately, with a note of what would trigger it, is a decision; forgetting it is not.
Questions people ask about start up business insurance
What insurance does a new business need?
Employers' liability if anybody is employed, motor insurance for any vehicle used for work, and public liability as soon as a customer, landlord or site requires it. Professional indemnity follows at the first engagement where a client relies on your work.
Is business insurance a legal requirement for a start up?
Only employers' liability, and only with employees, plus the ordinary motor duty. Everything else is a commercial decision or a contractual requirement, and contracts tend to make the decision for you.
How much does start up business insurance cost?
Insurers that publish a starting price for liability cover put it in single figures per month for the lowest risk case, which is close to what a one person start up with no employees and a modest limit looks like. The record on this site shows what each one prints.
Can I add cover later as the business grows?
Yes, and for property and interruption cover that is the sensible order. The exception is professional indemnity, which answers for claims made rather than work done, so starting it late leaves the earliest work without a policy behind it.