T&M contracts are advantageous to software development outsourcing because they allow the client to pay for services as they are delivered rather than paying for the entire project at once. This can make it easier for clients who do not have large budgets to invest in software development. T&M contracts are disadvantageous because they do not guarantee the same quality or service level as fixed-bid contracts. Clients may also be concerned about work being rushed or done poorly if they do not know exactly how much time they will have to complete their project.