The economic impact of autism in Britain.

Simpson et al. (2001) added up every pound spent on autism in the UK. They counted hospital bills, special schools, and caregiver time.

The team looked at people of all ages with autism. They wanted one big number to show lawmakers the total cost.

Autism costs the UK more than £1 billion every year. One person can need more than £2.4 million over a lifetime.

Most money goes to daily living support and day activities, not doctors.

Knapp et al. (2009) used the same math and got even bigger totals. Their newer count pushed the yearly bill to £27.7 billion and trimmed the lifetime figure to £0.8-1.2 million per person. The 2009 paper now replaces the 2001 guess.

Peters-Scheffer et al. (2012) flipped the question. They asked, "What if we pay for three years of full-time EIBI?" The Dutch team showed those upfront hours save about €1 million per person later.

Pye et al. (2024) scoured 50 studies and agreed: school costs hurt families most. All three papers point to the same lever—better early help lowers the price tag.

When you write a treatment plan, remember every skill you teach today can cut future care hours. Push for funding by showing that small gains now save millions later. Use the Knapp et al. (2009) numbers—they're current—and pair them with the Dutch EIBI savings to make your case.