I have to admit that, outside of written exams, I've never yet encountered a situation where I've found any need to make allowances for the time taken to climb.
The climb, for a light aircraft (especially VFR) tends to be so short (and subject to change due weather, if VFR) compared to the rest of the flight that it barely makes any noticeable difference to the time on the flight. On the rare occassions that a reasonably long climb is planned, it's usually sufficient to note that you may be very slightly late at your first way-point.
Having said that, if you really want to work it out accurately, tables in the POH might only be for Vy - which is fine if you plan a Vy climb, but if you plan any other speed, you'll need to use the technique LEVC describes.
FFF
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