Flight Crew Commercial; Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Total 8000
Situational Awareness
Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter CFTT / CFIT; Inflight Event / Encounter Weather / Turbulence
Flight Crew Became Reoriented
Human Factors; Weather
We were vectored for the ILS XX at ZZZ; upon crossing the VOR we flew the full approach. Visibility was 4 Miles overcast 200 ft. The overcast had previously been 300 ft. then dropped to 200 ft.; the DA (Decision Altitude) was 250 ft. We decided to fly the approach since the visibility was 4 miles. When reaching the DA of 250 ft. my copilot called runway in sight; I continued the descent for about five more seconds but I did not have contact with the runway ; just as I was pressing the go around button the runway came into full view. The 200 ft. overcast report was correct as far as I'm concerned. We were still in position to land so I continued the landing. After words I realized we were below the DA when I saw the runway and should have gone around. Hence this report.
CE525 flight crew reported descending below minimums on an ILS approach.