MAIN Dividend Calculator
Main Street Capital Corporation — Project your returns with dividend reinvestment (DRIP). Pays monthly.
Scenarios
Three paths based on historical CAGRs. Click any card to load it.
What is MAIN?
Main Street Capital (MAIN) is a Business Development Company (BDC) that makes loans to and equity investments in lower middle-market companies. The interest on those loans and returns on equity investments are the source of the dividends.
How MAIN generates dividends
Main Street Capital (MAIN) is a Business Development Company (BDC) that makes loans to and equity investments in lower middle-market companies. The interest on those loans and returns on equity investments are the source of the dividends.
Like REITs, BDCs are required to distribute at least 90% of their taxable income. Main Street Capital is known for paying monthly dividends plus supplemental (special) dividends when investment returns exceed expectations. The regular monthly dividend has been increased consistently over the years.
BDC dividends are generally taxed as ordinary income. The yield is higher than most blue-chip stocks because the underlying business (lending to mid-market companies) carries more credit risk than, say, selling Coca-Cola.
About the MAIN Dividend Calculator
This MAIN dividend calculator projects how your position grows with and without DRIP (Dividend Reinvestment). Every input is prefilled with live MAIN data — current price, latest per-share distribution, detected payment frequency, and historical CAGR — so you can hit calculate immediately, or override any field to model your own assumptions.
The MAIN DRIP calculator runs two parallel scenarios: one where every distribution is reinvested into more MAIN shares, and one where distributions are taken as cash and never compounded. The gap between the two curves is the compounding premium — the extra wealth you build by letting MAIN dividends buy more shares over time. Extra monthly contributions, tax rates, and custom dividend growth rates are all supported, and every calculation runs in your browser with no additional API calls after page load.
Why this calculator is more accurate than most
Traditional DRIP calculators treat dividend-per-share and share-price as two independent quantities that grow at their own separate rates. That works fine for stocks like SCHD or KO, where management sets the payout and the stock price moves with the business. It breaks badly for option-income ETFs like MSTY, NVDY, or TSLY, where distributions are sourced from option premium on the underlying — meaning the dividend dollar is mechanically a fraction of NAV, not a separate variable. Let those two quantities compound independently and you get absurd outputs (trillion-dollar portfolios from $10K) because the implied yield silently grows to 400%+ as price collapses faster than the dollar dividend.
We solve this with two projection modes. Dividend Growth mode is the standard model — correct for dividend-growth stocks and traditional income ETFs. Yield-on-NAV mode (auto-selected when starting yield exceeds 20%) locks the forward yield and recomputes distributions each year asyield × current NAV, so as price falls, dividend-per-share falls proportionally. This matches the physics of option-income funds and produces realistic projections instead of fantasy numbers.
You can toggle between the two modes above the input form. For MAIN, dividend-growth mode is the default and matches how most investors think about this asset.
Yield on Cost — the metric that matters for MAIN long-term holders
The yearly projection table includes a YoC (Yield on Cost) column. Yield on cost is your annual dividend income divided by what you originally paid — not by what MAIN is worth today. For a dividend-growth ETF, this is the single most important long-term number, because it reflects how the rising payout compounds against your fixed cost basis. A MAIN position bought today might yield 11.1% up front, but at historical dividend growth rates it can compound to a 7-12% YoC over 15-20 years without you adding a dollar. That is the "snowball" effect long-term MAIN holders are paying for, and it is invisible if you only look at headline yield.
The two levers that change results the most are the growth assumptions and the holding period. For a volatile, high-yield fund, a 0% or slightly negative growth assumption is usually more realistic than extrapolating a historical CAGR, because distribution levels often decay as implied volatility normalizes. For stable dividend ETFs and index funds, the 5Y CAGR is a reasonable baseline. The MAIN dividend history page shows every past payment in detail, and the total return analyzer strips out NAV erosion to show your real yield.