Civic Intelligence

Mason Preparatory School

Plan context: Mason Preparatory School 401K Plan

EIN 57-0447248 • Charleston, SC • 30 filings • 4 plans

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56 Halsey BlvdCharleston, SC 29401
Current Snapshot

Latest Year

2025

2025 Participants

51

2025 Assets

$3,239,714

2025 Contributions

$268,713

Historical Graphs

Total Assets Over Time

Aggregate end-of-year assets by filing year, excluding zero-asset years

$4,185,964$2,092,982$0199920122025YearValue
$3,239,714Latest year 2025

Participants Over Time

Largest reported end-of-year plan headcount by filing year, used to avoid double-counting participants across overlapping plans

73370199920122025YearValue
51Latest year 2025

Company Timeline

Year summaries and individual filings are combined here so you can stay in one place while moving across years and plan filings.

Year / FilingFilingsParticipantsAssetsContributionsContrib./Participant
2025151$3,239,714$268,713$5,269iApproximate average salary by contribution assumption: employee only about $131,722 at 4% or $87,815 at 6%; with 50% employer match about $87,815 at 4% or $58,543 at 6%; with 100% employer match about $65,861 at 4% or $43,907 at 6%.
Mason Preparatory School 401K Plan-51$3,239,714$268,713$5,269iApproximate average salary by contribution assumption: employee only about $131,722 at 4% or $87,815 at 6%; with 50% employer match about $87,815 at 4% or $58,543 at 6%; with 100% employer match about $65,861 at 4% or $43,907 at 6%.
2024148$2,794,628$233,071$4,856iApproximate average salary by contribution assumption: employee only about $121,391 at 4% or $80,927 at 6%; with 50% employer match about $80,927 at 4% or $53,952 at 6%; with 100% employer match about $60,696 at 4% or $40,464 at 6%.
Mason Preparatory School 401K Plan-48$2,794,628$233,071$4,856iApproximate average salary by contribution assumption: employee only about $121,391 at 4% or $80,927 at 6%; with 50% employer match about $80,927 at 4% or $53,952 at 6%; with 100% employer match about $60,696 at 4% or $40,464 at 6%.
2023147$2,685,493$168,332$3,582iApproximate average salary by contribution assumption: employee only about $89,538 at 4% or $59,692 at 6%; with 50% employer match about $59,692 at 4% or $39,795 at 6%; with 100% employer match about $44,769 at 4% or $29,846 at 6%.
Mason Preparatory School 401K Plan-47$2,685,493$168,332$3,582iApproximate average salary by contribution assumption: employee only about $89,538 at 4% or $59,692 at 6%; with 50% employer match about $59,692 at 4% or $39,795 at 6%; with 100% employer match about $44,769 at 4% or $29,846 at 6%.
2022149$2,309,634$202,146$4,125iApproximate average salary by contribution assumption: employee only about $103,136 at 4% or $68,757 at 6%; with 50% employer match about $68,757 at 4% or $45,838 at 6%; with 100% employer match about $51,568 at 4% or $34,379 at 6%.
Mason Preparatory School 401K Plan-49$2,309,634$202,146$4,125iApproximate average salary by contribution assumption: employee only about $103,136 at 4% or $68,757 at 6%; with 50% employer match about $68,757 at 4% or $45,838 at 6%; with 100% employer match about $51,568 at 4% or $34,379 at 6%.
2021158$3,670,566$166,803$2,876iApproximate average salary by contribution assumption: employee only about $71,898 at 4% or $47,932 at 6%; with 50% employer match about $47,932 at 4% or $31,955 at 6%; with 100% employer match about $35,949 at 4% or $23,966 at 6%.
Mason Preparatory School 401K Plan-58$3,670,566$166,803$2,876iApproximate average salary by contribution assumption: employee only about $71,898 at 4% or $47,932 at 6%; with 50% employer match about $47,932 at 4% or $31,955 at 6%; with 100% employer match about $35,949 at 4% or $23,966 at 6%.
2020146$3,747,406$228,610$4,970iApproximate average salary by contribution assumption: employee only about $124,245 at 4% or $82,830 at 6%; with 50% employer match about $82,830 at 4% or $55,220 at 6%; with 100% employer match about $62,122 at 4% or $41,415 at 6%.
Mason Preparatory School 401K Plan-46$3,747,406$228,610$4,970iApproximate average salary by contribution assumption: employee only about $124,245 at 4% or $82,830 at 6%; with 50% employer match about $82,830 at 4% or $55,220 at 6%; with 100% employer match about $62,122 at 4% or $41,415 at 6%.
2019151$4,184,375$279,211$5,475iApproximate average salary by contribution assumption: employee only about $136,868 at 4% or $91,245 at 6%; with 50% employer match about $91,245 at 4% or $60,830 at 6%; with 100% employer match about $68,434 at 4% or $45,623 at 6%.
Mason Preparatory School 401K Plan-51$4,184,375$279,211$5,475iApproximate average salary by contribution assumption: employee only about $136,868 at 4% or $91,245 at 6%; with 50% employer match about $91,245 at 4% or $60,830 at 6%; with 100% employer match about $68,434 at 4% or $45,623 at 6%.
2018161$3,938,665$301,808$4,948iApproximate average salary by contribution assumption: employee only about $123,692 at 4% or $82,461 at 6%; with 50% employer match about $82,461 at 4% or $54,974 at 6%; with 100% employer match about $61,846 at 4% or $41,231 at 6%.
Mason Preparatory School 401K Plan-61$3,938,665$301,808$4,948iApproximate average salary by contribution assumption: employee only about $123,692 at 4% or $82,461 at 6%; with 50% employer match about $82,461 at 4% or $54,974 at 6%; with 100% employer match about $61,846 at 4% or $41,231 at 6%.
2017158$4,185,964$303,790$5,238iApproximate average salary by contribution assumption: employee only about $130,944 at 4% or $87,296 at 6%; with 50% employer match about $87,296 at 4% or $58,197 at 6%; with 100% employer match about $65,472 at 4% or $43,648 at 6%.
Mason Preparatory School 401K Plan-58$4,185,964$303,790$5,238iApproximate average salary by contribution assumption: employee only about $130,944 at 4% or $87,296 at 6%; with 50% employer match about $87,296 at 4% or $58,197 at 6%; with 100% employer match about $65,472 at 4% or $43,648 at 6%.
2016157$3,932,470$299,519$5,255iApproximate average salary by contribution assumption: employee only about $131,368 at 4% or $87,579 at 6%; with 50% employer match about $87,579 at 4% or $58,386 at 6%; with 100% employer match about $65,684 at 4% or $43,789 at 6%.
Mason Preparatory School 401K Plan-57$3,932,470$299,519$5,255iApproximate average salary by contribution assumption: employee only about $131,368 at 4% or $87,579 at 6%; with 50% employer match about $87,579 at 4% or $58,386 at 6%; with 100% employer match about $65,684 at 4% or $43,789 at 6%.
2015156$3,388,660$271,962$4,856iApproximate average salary by contribution assumption: employee only about $121,412 at 4% or $80,941 at 6%; with 50% employer match about $80,941 at 4% or $53,961 at 6%; with 100% employer match about $60,706 at 4% or $40,471 at 6%.
Mason Preparatory School 401K Plan-56$3,388,660$271,962$4,856iApproximate average salary by contribution assumption: employee only about $121,412 at 4% or $80,941 at 6%; with 50% employer match about $80,941 at 4% or $53,961 at 6%; with 100% employer match about $60,706 at 4% or $40,471 at 6%.
2014151$3,392,394$249,183$4,886iApproximate average salary by contribution assumption: employee only about $122,149 at 4% or $81,432 at 6%; with 50% employer match about $81,432 at 4% or $54,288 at 6%; with 100% employer match about $61,074 at 4% or $40,716 at 6%.
Mason Preparatory School 401K Plan-51$3,392,394$249,183$4,886iApproximate average salary by contribution assumption: employee only about $122,149 at 4% or $81,432 at 6%; with 50% employer match about $81,432 at 4% or $54,288 at 6%; with 100% employer match about $61,074 at 4% or $40,716 at 6%.
2013152$3,124,036$235,126$4,522iApproximate average salary by contribution assumption: employee only about $113,041 at 4% or $75,361 at 6%; with 50% employer match about $75,361 at 4% or $50,241 at 6%; with 100% employer match about $56,521 at 4% or $37,680 at 6%.
Mason Preparatory School 401K Plan-52$3,124,036$235,126$4,522iApproximate average salary by contribution assumption: employee only about $113,041 at 4% or $75,361 at 6%; with 50% employer match about $75,361 at 4% or $50,241 at 6%; with 100% employer match about $56,521 at 4% or $37,680 at 6%.
2012149$2,652,106$241,247$4,923iApproximate average salary by contribution assumption: employee only about $123,085 at 4% or $82,057 at 6%; with 50% employer match about $82,057 at 4% or $54,705 at 6%; with 100% employer match about $61,543 at 4% or $41,028 at 6%.
Mason Preparatory School 401K Plan-49$2,652,106$241,247$4,923iApproximate average salary by contribution assumption: employee only about $123,085 at 4% or $82,057 at 6%; with 50% employer match about $82,057 at 4% or $54,705 at 6%; with 100% employer match about $61,543 at 4% or $41,028 at 6%.
2011150$2,438,561$250,126$5,003iApproximate average salary by contribution assumption: employee only about $125,063 at 4% or $83,375 at 6%; with 50% employer match about $83,375 at 4% or $55,584 at 6%; with 100% employer match about $62,532 at 4% or $41,688 at 6%.
Mason Preparatory School 401K Plan-50$2,438,561$250,126$5,003iApproximate average salary by contribution assumption: employee only about $125,063 at 4% or $83,375 at 6%; with 50% employer match about $83,375 at 4% or $55,584 at 6%; with 100% employer match about $62,532 at 4% or $41,688 at 6%.
2010149$2,495,677$283,153$5,779iApproximate average salary by contribution assumption: employee only about $144,466 at 4% or $96,311 at 6%; with 50% employer match about $96,311 at 4% or $64,207 at 6%; with 100% employer match about $72,233 at 4% or $48,155 at 6%.
Mason Preparatory School 401K Plan-49$2,495,677$283,153$5,779iApproximate average salary by contribution assumption: employee only about $144,466 at 4% or $96,311 at 6%; with 50% employer match about $96,311 at 4% or $64,207 at 6%; with 100% employer match about $72,233 at 4% or $48,155 at 6%.
2009146$2,198,724$235,647$5,123iApproximate average salary by contribution assumption: employee only about $128,069 at 4% or $85,379 at 6%; with 50% employer match about $85,379 at 4% or $56,920 at 6%; with 100% employer match about $64,035 at 4% or $42,690 at 6%.
Mason Preparatory School 401K Plan-46$2,198,724$235,647$5,123iApproximate average salary by contribution assumption: employee only about $128,069 at 4% or $85,379 at 6%; with 50% employer match about $85,379 at 4% or $56,920 at 6%; with 100% employer match about $64,035 at 4% or $42,690 at 6%.
2008158$1,463,492$245,561$4,234iApproximate average salary by contribution assumption: employee only about $105,845 at 4% or $70,564 at 6%; with 50% employer match about $70,564 at 4% or $47,042 at 6%; with 100% employer match about $52,923 at 4% or $35,282 at 6%.
Mason Preparatory School 401K Plan-58$1,463,492$245,561$4,234iApproximate average salary by contribution assumption: employee only about $105,845 at 4% or $70,564 at 6%; with 50% employer match about $70,564 at 4% or $47,042 at 6%; with 100% employer match about $52,923 at 4% or $35,282 at 6%.
2007151$2,344,085$261,866$5,135iApproximate average salary by contribution assumption: employee only about $128,366 at 4% or $85,577 at 6%; with 50% employer match about $85,577 at 4% or $57,051 at 6%; with 100% employer match about $64,183 at 4% or $42,789 at 6%.
Mason Preparatory School 401K Plan-51$2,344,085$261,866$5,135iApproximate average salary by contribution assumption: employee only about $128,366 at 4% or $85,577 at 6%; with 50% employer match about $85,577 at 4% or $57,051 at 6%; with 100% employer match about $64,183 at 4% or $42,789 at 6%.
2006146$1,885,430$238,615$5,187iApproximate average salary by contribution assumption: employee only about $129,682 at 4% or $86,455 at 6%; with 50% employer match about $86,455 at 4% or $57,636 at 6%; with 100% employer match about $64,841 at 4% or $43,227 at 6%.
Mason Preparatory School 401K Plan-46$1,885,430$238,615$5,187iApproximate average salary by contribution assumption: employee only about $129,682 at 4% or $86,455 at 6%; with 50% employer match about $86,455 at 4% or $57,636 at 6%; with 100% employer match about $64,841 at 4% or $43,227 at 6%.
2005148$1,616,081$200,053$4,168iApproximate average salary by contribution assumption: employee only about $104,194 at 4% or $69,463 at 6%; with 50% employer match about $69,463 at 4% or $46,309 at 6%; with 100% employer match about $52,097 at 4% or $34,731 at 6%.
Mason Preparatory School 401K Plan-48$1,616,081$200,053$4,168iApproximate average salary by contribution assumption: employee only about $104,194 at 4% or $69,463 at 6%; with 50% employer match about $69,463 at 4% or $46,309 at 6%; with 100% employer match about $52,097 at 4% or $34,731 at 6%.
2004145$1,454,023$191,642$4,259iApproximate average salary by contribution assumption: employee only about $106,468 at 4% or $70,979 at 6%; with 50% employer match about $70,979 at 4% or $47,319 at 6%; with 100% employer match about $53,234 at 4% or $35,489 at 6%.
Mason Preparatory School 401K Plan-45$1,454,023$191,642$4,259iApproximate average salary by contribution assumption: employee only about $106,468 at 4% or $70,979 at 6%; with 50% employer match about $70,979 at 4% or $47,319 at 6%; with 100% employer match about $53,234 at 4% or $35,489 at 6%.
2003150$1,253,778$165,958$3,319iApproximate average salary by contribution assumption: employee only about $82,979 at 4% or $55,319 at 6%; with 50% employer match about $55,319 at 4% or $36,880 at 6%; with 100% employer match about $41,490 at 4% or $27,660 at 6%.
Mason Preparatory School 401K Plan-50$1,253,778$165,958$3,319iApproximate average salary by contribution assumption: employee only about $82,979 at 4% or $55,319 at 6%; with 50% employer match about $55,319 at 4% or $36,880 at 6%; with 100% employer match about $41,490 at 4% or $27,660 at 6%.
2002158$951,058$148,280$2,557iApproximate average salary by contribution assumption: employee only about $63,914 at 4% or $42,609 at 6%; with 50% employer match about $42,609 at 4% or $28,406 at 6%; with 100% employer match about $31,957 at 4% or $21,305 at 6%.
Mason Preparatory School 401K Plan-58$951,058$148,280$2,557iApproximate average salary by contribution assumption: employee only about $63,914 at 4% or $42,609 at 6%; with 50% employer match about $42,609 at 4% or $28,406 at 6%; with 100% employer match about $31,957 at 4% or $21,305 at 6%.
2001153$988,238$189,750$3,580iApproximate average salary by contribution assumption: employee only about $89,505 at 4% or $59,670 at 6%; with 50% employer match about $59,670 at 4% or $39,780 at 6%; with 100% employer match about $44,752 at 4% or $29,835 at 6%.
Mason Preparatory School 401K Plan-53$988,238$189,750$3,580iApproximate average salary by contribution assumption: employee only about $89,505 at 4% or $59,670 at 6%; with 50% employer match about $59,670 at 4% or $39,780 at 6%; with 100% employer match about $44,752 at 4% or $29,835 at 6%.
2000373$966,433$175,214$2,400iApproximate average salary by contribution assumption: employee only about $60,005 at 4% or $40,003 at 6%; with 50% employer match about $40,003 at 4% or $26,669 at 6%; with 100% employer match about $30,002 at 4% or $20,002 at 6%.
Mason Preparatory School 401K Plan-73$966,433$175,214$2,400iApproximate average salary by contribution assumption: employee only about $60,005 at 4% or $40,003 at 6%; with 50% employer match about $40,003 at 4% or $26,669 at 6%; with 100% employer match about $30,002 at 4% or $20,002 at 6%.
MASON PREPARATORY SCHOOL PREMIUM ONLY PLAN-0---
Mason Preparatory School Employees Retirement Plan-0---
1999269$995,391$163,710$2,373iApproximate average salary by contribution assumption: employee only about $59,315 at 4% or $39,543 at 6%; with 50% employer match about $39,543 at 4% or $26,362 at 6%; with 100% employer match about $29,658 at 4% or $19,772 at 6%.
Mason Preparatory School 401K Plan-69$995,391$163,710$2,373iApproximate average salary by contribution assumption: employee only about $59,315 at 4% or $39,543 at 6%; with 50% employer match about $39,543 at 4% or $26,362 at 6%; with 100% employer match about $29,658 at 4% or $19,772 at 6%.
Mason Preparatory School Employees Retirement Plan-0---