How long does it take for HIV symptoms to show?

Indeterminate. It can take several weeks/months to seroconvert positive after an exposure to hiv. Symptoms may not occur until even longer depending on the individuals current condition, etc. For example, if someone is already immonulogically compromised, then the may get symptoms quicker, whereas if someone is generally healthy, they may not show symptoms for quite some time. If exposed, see dr. ; get tested.