Ask HN: How Long Does it usually take to become profitable?

I don't think you can give a fixed timeframe. Many startups are not "profitable" but are capable of paying their founders salaries. Depends on what your profit goals are.

I would use:

Y = λf.(λx.f (x x)) (λx.f (x x))

Where y is months to profitability, λ is # of cofounders, and x is funding.

Serious answer: Who knows. Some businesses models just can't achieve profitability no matter how much time, money and brainpower you throw at it. So without some idea of the idea, no way to really answer the question.

The average is 31 days per co founder, plus 10 days for each 100K in funding.