5 Safe Monthly Pay Dividend Stocks Boomers Love in September

Boomer income investors want one thing above the rest: reliable checks that land every month. This September lineup spreads that mandate across four distinct income engines: net-lease retail, industrial warehouses, lower-middle-market private credit, and buyout-focused private credit. The anchor stat that frames the group: Realty Income just declared its 136th common stock monthly dividend increase on September 8, 2026, and every name below has either raised or held its distribution over the trailing twelve months.

Realty Income (O)

Realty Income (NYSE:O) yields 5.71% at a recent price of $56.51, with a $0.2715 monthly payout most recently raised for the September 30, 2026 ex-date. Coverage is the reason the check clears: Q2 2026 AFFO per share of $1.09, up 3.8% year over year, easily funds the annualized $3.252 dividend, and full-year 2026 AFFO guidance was raised to $4.44 to $4.45. The balance sheet carries a Fitch ‘A’ rating with Stable Outlook and Net Debt/EBITDAre of 5.4x, and Q2 marked the 115th consecutive quarterly dividend increase.

Bull case: portfolio occupancy sits at 98.8%, the company invested $2.6 billion in Q2 at a 7.3% initial cash yield, and a $6 billion hyperscale data center joint venture plus the newly announced Euro-denominated joint venture with KKR extend the growth runway beyond traditional retail. Risk: 65.7% of annualized base rent comes from non-investment-grade tenants, and leverage ticked up from 5.2x.

Agree Realty (ADC)

Agree Realty (NYSE:ADC) yields 4.62% at $67.34, paying a monthly dividend of $0.267 that was raised from $0.262 earlier in 2026 and has not been cut across the trailing twelve months. Q2 2026 AFFO per share of $1.14, up 7.4% year over year, more than covers the payout, and management raised full-year AFFO guidance to $4.57 to $4.59. The portfolio is arguably the cleanest in net lease: 2,825 properties across all 50 states and DC, 99.8% occupied, with 73.2% of ABR from investment-grade tenants.

Bull case: record Q2 acquisitions of $501.7 million at a 7.0% cap rate with an 11.2-year weighted average lease term, $1.9 billion in liquidity, and a net debt/EBITDA of 5.2x (3.7x proforma). Risk: interest expense climbed to $40.3 million versus $32.3 million a year ago, and equity-funded acquisitions produced a Q2 EPS miss.

STAG Industrial (STAG)

STAG Industrial (NYSE:STAG) yields 4.04% at $37.33 and pays monthly, with an approximately $0.1292 monthly distribution ($0.3875 quarterly rate). The dividend was held across the trailing twelve months. Coverage comes from Core FFO: Q2 2026 Core FFO per share of $0.65, up 3.2% year over year, alongside same-store cash NOI growth of 3.4%. Balance sheet health: Net Debt/EBITDAre of 5.2x after refinancing $350 million of term loans out to January 2032.

Bull case: pricing power in single-tenant warehouses remains stout, with cash rent change of +19.8% and straight-line +33.7%, a fourth consecutive EPS beat, and an acquisition pipeline of 145 buildings, $4 billion, 35.1 million square feet. Risk: total portfolio occupancy of 94.5% trails operating occupancy, and interest expense rose to $37.5 million versus $33.6 million.

Main Street Capital (MAIN)

Main Street Capital (NYSE:MAIN | MAIN Price Prediction) yields 5.49% at $56.03, and that figure understates the cash flow: the regular monthly payout stepped up from $0.255 in late 2025 to $0.265 beginning with the October 2026 ex-dividend date, and a supplemental dividend of $0.30 per share payable in September was declared, marking the 20th consecutive quarterly supplemental. Coverage read: Q2 2026 DNII before taxes per share of $1.08 against a monthly payout run rate that leaves room to spare, and annualized ROE of 18.9%. Trailing supplemental distributions totaled $1.20 per share, representing an additional 38% paid to shareholders in excess of regular monthly dividends.

Bull case: non-accruals at 1.1% of fair value, a $1.24 billion corporate facility extended to June 2031, and management said it currently anticipated proposing an additional significant supplemental dividend payable in December 2026. Risk: management flagged increased cost of capital following the refinancing of the July 2026 notes and guided Q3 DNII before taxes to be at least $0.97 per share, a step down from Q2’s non-recurring boost.

Gladstone Investment (GAIN)

Gladstone Investment (NASDAQ:GAIN) is the smallest and least liquid name here, with a market cap of just $648 million and shares recently at $15.80. It is the only ultra-high-yield entry in the group, yielding 6.06% on a monthly distribution held at $0.08 per share for the full trailing twelve months. Coverage: fiscal Q1 2027 Adjusted NII per share of $0.26, which management said was "sufficient to cover the monthly dividend distributions for the quarter." Spillover income climbed to $22.5 million, or $0.56 per share, an additional cushion behind the payout.

Bull case: 100% of debt investments are variable rate indexed to 30-day SOFR, the portfolio weighted average yield is 12.9%, and management expects a "very significant capital gain" from the pending SFEG Holdings sale that could seed a future supplemental. The credit facility was expanded to $405 million with maturity extended to June 2031. Risk: NAV per share slipped to $16.24, down 3.2% sequentially from $16.78, three portfolio companies sit on non-accrual, and the small float means volatility can spike quickly.

Bottom Line

This is what monthly-pay diversification actually looks like: two blue-chip net-lease REITs with investment-grade tenants, a warehouse landlord riding double-digit re-leasing spreads, an internally managed BDC compounding through supplementals, and a small-cap buyout BDC with capital-gains optionality. Every name has raised or held its distribution over the last year, each is covered by the right metric (AFFO for the REITs, Core FFO for STAG, DNII and NII for the BDCs), and together they cover four distinct cash-flow engines rather than four flavors of the same one. For income-focused Boomers building a monthly paycheck ladder, that breadth is the whole point.

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