If you buy investment property in Fall River or anywhere on the South Coast, your lender does not fall in love with the porch. They underwrite a ratio: DSCR — debt service coverage. Get it wrong and the deal dies at the bank even when your spreadsheet still shows “a little cash flow.”
This post defines DSCR the way we use it with clients, shows the formula, explains the common 1.20×–1.25× floor, and walks a live Fall River six-family through Fortified’s free Buy & Hold Analyzer so you can check a deal in about a minute. Same tool we use when buyers ask what to offer — and whether to walk.
What is DSCR?
DSCR means debt service coverage ratio. In one line:
DSCR = yearly NOI ÷ yearly debt service
NOI (net operating income) is income after vacancy and operating expenses, before the mortgage. Debt service is the annual principal and interest (P+I) on the loan you model — monthly P+I × 12.
DSCR answers: Does this building’s income cover the note, and by how much cushion?
- 1.00× — NOI exactly equals annual debt service. No cushion.
- Below 1.00× — on paper, the property does not cover the payment.
- Above 1.00× — income exceeds debt service; the higher the ratio, the more room for vacancy, repairs, or a bad winter.
Example: yearly NOI $57,460 and yearly P+I $44,512 → DSCR ≈ 1.29×. That is the live math on our sample six-family at a $725,000 price and 75% LTV in the analyzer (same stack as our Buy & Hold underwriting walkthrough).
Why your lender cares more than your Facebook group
You might celebrate $400–$1,000 a month of “cash flow.” Your lender underwrites whether NOI covers debt service with margin. That conversation shows up with community banks, credit unions, and non-QM / DSCR loan desks alike — programs differ, but on Fall River and Bristol County multi-family investment files we routinely see underwriting gravity around:
- ~1.20×–1.25× as a common minimum conversation
- Stronger DSCR → easier yes, better structure, less drama
- Thin DSCR → conditions, more down, rate junk, or a hard no
Critical trap: positive cash flow with weak DSCR. Cash flow after debt can look green while DSCR sits under the lender’s floor — especially if your “cash flow” ignored vacancy, management, or real insurance. DSCR is the language credit committees speak. Learn it before the commitment letter.
DSCR is not cap rate and not cash-on-cash:
- Cap rate = yearly NOI ÷ purchase price (unlevered; ignores the loan)
- Cash-on-cash = annual cash flow after debt ÷ cash to close (yield on your equity checks)
- DSCR = yearly NOI ÷ yearly debt service (coverage of the note)
You need all three. DSCR is the one that kills financing first.
How to calculate DSCR (and how to check it fast)
- Build honest gross rent (every unit).
- Apply vacancy (we often model 5–10% on South Coast multi-family — not zero).
- Load full operating expenses: taxes, insurance, management, reserves, owner-paid utilities, snow, repairs. Do not delete professional management to juice the sheet.
- Compute NOI.
- Model the loan: price, LTV, rate, term → monthly P+I → yearly debt service.
- DSCR = yearly NOI ÷ yearly debt service.
Or skip the napkin: open Fortified’s free Buy & Hold Analyzer, enter the deal, and read Debt Service Coverage in Deal Analysis. No login. Same categories lenders underwrite. When it is honest, Save as PDF and send it with your loan package.
Worked example: Fall River six-family (live tool)
Sample teaching deal — not a live listing:
- Six units at $1,500/month → $9,000/month gross
- Vacancy 10% · management 10% · reserves 3%
- Taxes $8,000/year · insurance $9,000/year
- Electric $75 · water/sewer $200 · snow/landscape $250 · repairs $200 per month
- Financing: 75% LTV, 7.25%, 360 months, 3% closing costs
Hold income and expenses fixed. Change only price — and watch DSCR move.
Same NOI. Higher price → larger loan at the same LTV → higher debt service → lower DSCR. That is why offer price is not a vibe. It is coverage math. Use the analyzer’s Buying Range Analysis to slide price and mark where DSCR clears your (and your lender’s) bar — and where the deal breaks. Full underwrite walkthrough: How to underwrite a multi-family in Fall River with the Buy & Hold Analyzer.
Sometimes the best deal is the one you don’t buy — especially when DSCR only works if you lie about vacancy or insurance.
What DSCR does not tell you
- It does not replace a unit walk, lease audit, or CapEx eyes on roof, electric, and porches — especially pre-1978 Fall River stock with lead and envelope surprises.
- It does not fix a bad borrower file or a program that will not lend on the asset type (some desks hate mixed-use; some hate thin reserves).
- It does not equal cash-on-cash or cap rate — read both when you set price (cap rate / NOI guide ships next in this tools drip).
- It is only as honest as your NOI. Garbage in, garbage DSCR. Use real taxes, insurance, vacancy, and management — not seller “pro forma.”
Check your DSCR before you write the offer
Free Buy & Hold Analyzer — also on the owners toolkit and calculator hub. Results update as you type. Save as PDF for your lender or partner.
Want an operator’s second set of eyes after the math? Fortified Realty Group — (508) 671-7228. Management pricing (when you model 10% management like a grown-up): property management pricing.
DSCR FAQs
What is DSCR on a rental property?
DSCR (debt service coverage ratio) is yearly net operating income (NOI) divided by yearly debt service (annual mortgage principal and interest). It measures whether the property’s income covers the loan payment and by how much cushion. A DSCR of 1.25× means NOI is 25% higher than annual debt service on the assumptions you entered.
What DSCR do lenders want on Fall River investment property?
Programs vary, but many South Coast multi-family investment conversations orbit about 1.20×–1.25× minimum DSCR. Stronger coverage is easier to finance. A deal can show small positive cash flow and still sit under the lender’s DSCR bar — which is why you calculate coverage before you celebrate the spreadsheet.
How do I calculate DSCR quickly?
Compute yearly NOI (income after vacancy and operating expenses, before debt). Compute yearly P+I on your loan. Divide NOI by debt service. Or enter the deal in Fortified’s free Buy & Hold Analyzer and read Debt Service Coverage in Deal Analysis — no login required.
Can positive cash flow still fail DSCR?
Yes. Cash flow after debt can look fine while DSCR is thin if the lender’s minimum is higher than your personal “I’ll take any green number” standard. DSCR is a coverage ratio on NOI vs debt service; cash flow is what is left after the payment. Lenders underwrite coverage first.
How does purchase price change DSCR?
At a fixed LTV and rate, a higher purchase price usually means a larger loan and higher annual debt service. NOI does not rise just because the ask did. Higher debt service on the same NOI lowers DSCR. That is why buying-range analysis matters when you decide what to offer on a Fall River multi-family.
Where can I run DSCR on a Fall River multi-family for free?
Use Fortified Realty Group’s Buy & Hold Analyzer at fortifiedrealty.net/calculators/buy-and-hold. It calculates NOI, debt service, DSCR, cash flow, cap rate, and cash-on-cash, plus a buying-range table. Save as PDF for your lender conversation. Call (508) 671-7228 if you want an operator review after the math.
Educational example only. Not tax, legal, appraisal, or lending advice. Loan program guidelines vary. Always verify rents, expenses, and loan terms for the specific asset.