Loss mitigation waterfall decisioning: the right investor’s rules, every step shown, and the underwriter signs
The right option at the right payment, with every step defensible.
See one case, screen by screen ↓Software that takes a complete loss mitigation application and tests each home retention option in the order the loan’s investor or insurer sets — for FHA, a standalone partial claim, a payment supplement, then a 30-year and a 40-year modification — and finds the first one that fits. Loss Mitigation Waterfall Decisioning adds agents that read the package and the loan’s history, show the rule and the arithmetic at every step, and draft the evaluation notice.
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A complete loss mitigation application starts the Regulation X clock: 30 days to a written decision, with the foreclosure referral held while it runs. In that time the workout underwriter has to work out which investor or insurer owns the rules, which version was in force on the evaluation date, and walk the borrower down that waterfall — standalone partial claim, payment supplement, 30-year modification, 40-year modification — with the right payment target, market rate and cap at every step.
FHA, VA, USDA and the GSEs each set their own order, targets and caps, and FHA and VA both rewrote theirs in 2025–2026. The spreadsheet changes last. So a prior partial claim goes uncounted and the claim is curtailed when HUD pays it, an escrow shortage is capitalized instead of spread, last week’s rate sets the payment, or a denial notice gives a reason the waterfall never tested. Each of those comes back in QC, in an appeal or in an exam.
Estimated split from complete to a signed decision, by spreadsheet and with the solution. In the working solution, files since go-live were decided at a median of day 4 of 30.
Six specialist agents read the file, run the investor's waterfall step by step, compare all four investors' rules and draft the notice; the underwriter signs.
Marcus and Elena Whitfield are five installments behind on their FHA loan. Their application went complete on Monday 28 September; today is day 14 of 30. Here is what happens next, screen by screen, in the working solution.
Tamsin opens Complete files: 9 to decide, $74,775.96 in arrears across them, 2 with the foreclosure held. Each row shows the investor, days delinquent, the Regulation X clock and the likely outcome. The Whitfields — FHA, 133 days delinquent, a prior partial claim — are due Wed 28 Oct.
“Every complete loss mitigation application, ordered by its Regulation X clock — 30 days from complete to a written decision.”
The package reader reads 23 documents — the borrower assistance form, hardship letter and affidavit, four pay stubs, two bank statements, the 2025 return. The loan history reader reads the servicing record, the rule selector picks FHA 2026.2 from the FHA case number and the GNMA II pool, the escrow and rate checker applies October’s numbers, the calculator runs five steps and the notice drafter writes the offer.
Arrears $12,549.20 · day 14 of 30 · result: 40-year modification, −25.0% P&I, new payment $2,127.33.
Four findings, each with the document behind it. A standalone partial claim of $27,410.00 from 14 Aug 2024 counts toward the 30% cap, leaving $52,785.85. Stated income is 8.2% above the pay stubs — Elena’s overtime is in neither of her last two stubs — so the documented $5,140 is used. A new escrow analysis puts escrow at $641.00, with the $1,968 shortage spread over 60 months, and Thursday’s survey sets the market rate at 6.375%.
“The team’s old spreadsheet used the full cap.”
The household’s numbers enter at the top and are tested at each step in order. Standalone partial claim fails: −$61.64 surplus after the $2,591.64 payment, against the $250 minimum. Payment supplement does not apply: the 6.750% note rate is above 6.375%. The 30-year modification reaches only −21.1% at the cap. The 40-year modification passes: payment reduced 25.0%.
P&I $1,795.32 → $1,346.49 · new payment $2,127.33 a month, $382.51 less · partial claim $46,336.13 · cap room left $6,449.72.
On the file’s waterfall each step lists its tests and shows the arithmetic underneath. The partial claim cap panel spells out why the 30-year option fails: 30% of $267,319.50 is $80,195.85; the 30-year option would need $64,040.05 against the $52,785.85 left. The inputs panel lets her change income, expenses or rate as a what-if without touching the decision on file.
Over the cap by $11,254.20 — a claim HUD would curtail.
All four investors runs the Whitfields through FHA 2026.2, GSE 2026.1, VA 2025.6 and USDA 2025.3 side by side. The GSE lane stops at Flex Modification, payment reduced 22.3%; VA at its 40-year modification, 10.1%; USDA at a modification with a recovery advance, 20.0%. Only the FHA lane is badged “Applies · FHA case 562-1180743 · GNMA II pool”.
“Same household, four answers.” The rule selector read the case number and the pool, so FHA 2026.2 decides this file.
Today, the standalone partial claim, the 30-year and the 40-year modification in columns: rate, term, balance, P&I, escrow, the 60-month shortage, mortgage insurance, monthly payment, partial claim, cap used with the 2024 claim, maturity and household surplus. The 30-year option uses 100% of the cap; the 40-year uses 92.0% and leaves the household $402.67 a month.
“The waterfall picks the first option that meets the target — the 40-year modification.”
A trial plan of three payments of $2,127.33 due 1 Nov, 1 Dec and 1 Jan, then a modified balance of $233,532.57 at a fixed 6.375% for 40 years from 1 Feb 2027. The notice explains each option not offered, in plain words, and gives the 14-day appeal right. Eight notice checks tie it to Regulation X and the FHA trial rule — from the specific reason for each option not offered (§1024.41(d)) to the appeal (§1024.41(h)).
The notice is marked “drafted · sent only after signature”.
She approves a 40-year modification with a $46,336.13 partial claim under rule set FHA 2026.2. The meaning of her signature — “I approve this option under FHA 2026.2” — is recorded with it, along with a note for QC: the prior partial claim limits the cap, the 30-year option falls short at 21.1%, documented income used.
The partial claim is above $25,000, so the team lead co-signs before the offer is sent.
Derek co-signs from the team lead queue and the decision reads Signed. Tamsin sends the offer: the trial offer and evaluation notice go to the Whitfields by mail and the borrower portal, Jordan Pike calls them the same day, and QC gets the decision record — rule set, every step, its arithmetic and the 23 documents.
The same file, seen by the four people who carry it — what their week looked like, and what it looks like now.
Six specialist agents read the file, run the investor's waterfall step by step, compare all four investors' rules and draft the notice; the underwriter signs.
Reads the borrower assistance form, hardship letter, pay stubs, bank statements and tax return, and works out documented income and the household budget.
Reads the servicing record: balance, installments due, escrow, mortgage insurance, prior workouts and partial claims, bankruptcy and foreclosure status.
Identifies the investor or insurer from the case number, pool, investor code or trust, and chooses the waterfall version in force on the evaluation date.
Applies the latest escrow analysis and spreads any shortage as the investor requires; takes the week’s market rate.
Runs every step of the chosen waterfall in order, computes targets, payments, partial claims and the cap, and shows its arithmetic.
Drafts the trial offer and the evaluation notice, with the reason for every option not offered and the appeal right.
Decides and signs; team lead co-signs above $25,000. The agents propose; a named person decides.
Underwriters, team leads and QC can ask in plain words — or try a what-if. Every answer points to the document or rule behind it.
Why isn’t the 30-year modification offered?
Because the cap binds. FHA allows partial claims up to 30% of the balance at default — $80,195.85 — and the Whitfields already used $27,410.00 in August 2024. That leaves $52,785.85. The 30-year option needs $64,040.05 to reach the target, so at the cap the P&I is $1,416.70 — −21.1%, short of 25%. The 40-year option meets it with a $46,336.13 claim.
What did the old spreadsheet get wrong on this file?
It did not count the 2024 partial claim. It used the full cap of $80,195.85 and showed the 30-year option at −25.0% with a $64,040.05 claim — $11,254.20 over the cap, which HUD would curtail. The same mistake appears in 9 of the 28 spreadsheet-era decisions QC replayed. Its rate was also last week’s 6.500%.
What if Elena’s overtime comes back — $420 a month?
Then net income is about $4,640 and the household keeps $268.36 after the current payment — above the $250 minimum — so the waterfall stops at step 1: a standalone partial claim of $12,549.20 and no modification. But neither of her last two pay stubs shows overtime, so the documented income stands and the decision stays the 40-year option.
What would a GSE’s rules have offered the Whitfields?
Flex Modification, payment reduced 22.3% at the posted 6.500% rate — after reinstatement, a repayment plan and a payment deferral all fail. VA’s 40-year modification: payment reduced 10.1%; USDA’s modification with a recovery advance: payment reduced 20.0%. None of them decides this file: the FHA case number and the GNMA II pool make it FHA, so FHA 2026.2 applies — 40-year modification, −25.0%.
13 screens from the working solution, on its sample data. Pick one to see it large.
Changes are versioned, tested against past decisions and on the audit trail.
| Setting | Default | Choose from |
|---|---|---|
| Ability to resume the payment | $250 surplus a month | Any dollar amount |
| Income used when stated and documented differ | Documented, last 2 pay stubs | Last 2 pay stubs · 12-month average · lower of stated and documented |
| Escrow shortage spread | 60 months | 60 · 48 · 12 months |
| Flag stated income above documented by | 5% | 3 · 5 · 10% |
| Market rate source | Weekly 30-year survey rate | Weekly survey rate · investor-posted modification rate |
| Rate locked at | Evaluation date | Evaluation date · trial offer date |
| Team lead co-signs partial claims above | $25,000 | $15,000 · $25,000 · $40,000 |
| QC sample | Every 40-year modification + 5% of the rest | Every 40-year + 5% of the rest · 10% of all decisions · every decision |
Every figure is labelled: a target the solution is built to, an estimate, a typical published result, or a proven one.
“demo” = seen in the working solution, on its sample servicing data · “target” = the design goal, measured in the live solution · “estimated” = our estimate · “typical” = published figures (MBA National Delinquency Survey, Q2 2026 — FHA delinquency 11.79%; MBA, cost of servicing performing and non-performing loans — $1,573 vs $176 a year). People, servicers, borrowers and loans named on this page are fictional — characters and sample data in the working solution.
Software that takes a complete loss mitigation application and tests each home retention option in the order the loan’s investor or insurer sets — for FHA, a standalone partial claim, a payment supplement, then a 30-year and a 40-year modification — and finds the first one that fits. Loss Mitigation Waterfall Decisioning adds agents that read the package and the loan’s history, show the rule and the arithmetic at every step, and draft the evaluation notice.
In the working solution: FHA, VA, USDA, GSE-owned loans, the servicer’s own portfolio policy and private-label trusts by their servicing agreements — six rule sets. The rule selector picks the right one from the case number, pool, investor code or trust.
Each rule set is a dated version. A file is decided under the version in force on its evaluation date, and a new version runs against its test cases and past decisions before the compliance analyst approves it. In the working solution, VA 2026.11 is scheduled for 2 Nov after passing 38 of 38 tests.
Yes. The loan history reader always reports prior partial claims, and the cap is checked before any option is tested. On the sample file, a 2024 claim of $27,410.00 left $52,785.85 of the $80,195.85 cap — which is why the 30-year option fell short and the 40-year option was offered.
The notice drafter writes the trial offer and the evaluation notice, with the specific reason for each option not offered and the 14-day appeal right, and the notice is checked against a list of required content. Reasons come only from the waterfall record, and nothing is sent until the decision is signed.
Yes. The agents recommend; a workout underwriter decides and signs every option. The team lead co-signs partial claims above $25,000 and every file where no home retention option fits. The agents never approve, deny, send or change the loan record.
Every decision carries its rule version, every step with its arithmetic and the documents behind each figure, so QC replays a decision rather than rebuilding it. The QC sample — every 40-year modification and 5% of the rest by default — is a setting.
The Agentic Solution Engine builds and deploys it from your requirements — your servicing policy, investor rule sets, notice templates and a sample of past decisions — and it goes live once every quality gate has passed. We will walk you through it on your own past files first.
Missing-item letters out the same day, decisions inside 30 days.
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1-min demoWe’ll run Loss Mitigation Waterfall Decisioning on a sample of your own past workout decisions.