Fund it, rather than borrowing for it
Wedding expenses are among the most predictable large outflows a family faces, yet they are frequently met by liquidating long-term investments, dipping into retirement savings or taking a personal loan at a high rate.
Given a horizon of fifteen years or more, a modest monthly amount comfortably covers what would otherwise be a painful lump sum.
Keep it separate from retirement
The most common and most costly mistake is funding a wedding out of a retirement corpus. There is no loan available for retirement, and the years lost to compounding cannot be recovered. Plan the two separately and protect the retirement corpus.