home stretch

the home stretch (the last part of a long or difficult activity, etc. when it is nearly completed) — финишная прямая

in the home stretch, in the home straight (esp. BrE) —1. на последней прямой; на финишной прямой
2. на последнем /заключительном / завершающем / решающем этапе (работы)

approach(ing) the finishing line (nearing the end)

Example 1: We've been (working) on the project for half a year, but we're in the home stretch now.
Example 2: We're going into the home stretch of the presidential election. (CIDI)

see also
[down to the short strokes]

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The home stretch is the last part of a race.