New startup ideas · Direct giving, without the middlemen · The 2026 deduction as a product
startup concept
Substantia
An agent that substantiates the new charitable deduction for CPA clients
An agent service for CPA firms preparing 2026 returns: with client permission it reads bank transactions and email receipts, matches each cash gift to a charity that was qualifying and in good standing on the gift date, validates that the acknowledgment meets IRC 170(f)(8), applies the $1,000/$2,000 cap and the itemizer 0.5% AGI floor correctly, and produces workpapers.
- AI agent as a service
- Small business
- Universal charitable deduction from 2026
6
similar startups, last 2 years (9 all-time)
no
no public money matching the concept's terms
Test it before you build it
$900 · 4 weeks · 20 prospects
For $900 and four weeks, prove that partners at small 1040-heavy CPA firms will pay a $250 reservation for per-return charitable substantiation rather than sign 2026 returns on client self-reporting.
Riskiest assumption · Partners at small 1040-heavy CPA firms believe client self-reporting is not enough to sign a return claiming the new $1,000/$2,000 deduction, and will pay about $2 per return to substantiate it.
1Focus group: who and where
The tax partner or owner of a 2-10 preparer CPA firm filing 500-plus Form 1040s a season, choosing 2026-season tooling right now (August-October 2026) and realizing every non-itemizing client can suddenly claim $1,000 ($2,000 MFJ) in cash gifts that still need 170(f)(8) acknowledgments the client has never had to keep.
where to find 20 · r/taxpros on Reddit, where small-firm preparers debate season software daily (community); the member directories of the California Society of CPAs and the Texas Society of CPAs, filtered to small tax practices (list); the Drake Software and Intuit ProConnect user forums where these firms already discuss workflow tools (channel); and fall NATP chapter meetings (event).
2Sell first, build later
A founding-firm slot for the January-April 2027 season: Substantia processes charitable substantiation for up to 500 of the firm's 1040 clients - receipt and bank matching, gift-date charity standing checks, 170(f)(8) validation, cap and AGI-floor computation, audit-ready workpapers - live by January 15, 2027, running alongside the firm's existing tax software.
the ask · $2 per processed return, invoiced monthly during the season, $500 season minimum; founding firms lock $2 per return through the 2028 season.
a real yes · A real yes is a $250 paid reservation or a signed founding-firm order with a January start date; 'we'd try it in January,' requests for a free season, and compliments on the workpapers are a no.
3Small experiments
The first one attacks the riskiest assumption; each ends with a number that says whether to run the next.
1. Partner calls on self-report risk
$200 · 14 days
Book 15 20-minute calls with partners recruited from r/taxpros and the state society directories. Ask how they plan to substantiate the new deduction across hundreds of returns, whether they will sign on client say-so alone, then present the $2-per-return founding-firm offer. One founder runs every call from a fixed script and logs the answers.
keep going if · 9 of 15 partners say they will not sign returns on client self-reporting alone and ask for the founding-firm pricing sheet
2. Sample workpaper close
$250 · 10 days
Build one fictitious-client workpaper pack as a PDF: bank-transaction and email-receipt matching, charity standing on each gift date, a 170(f)(8) acknowledgment checklist, and the $1,000/$2,000 cap and 0.5% AGI floor computation. Send it to every partner who took a call, with the $250 reservation checkout linked on the last page.
keep going if · 4 of 12 firms that receive the pack pay the $250 reservation
3. New-deduction webinar funnel
$450 · 21 days
Run a 30-minute webinar, 'Substantiating the new $1,000/$2,000 charitable deduction on 2026 returns,' promoted with a post in r/taxpros and a paid placement in one state society newsletter. Close with the founding-firm offer and the reservation link.
keep going if · 40-plus registrants, of whom 8 book a founding-firm pricing call
4Collect a deposit up front
Tesla took $1,000 refundable reservations for the Model 3 and $100 for the Cybertruck before building either: the deposit is the measurement, not the revenue.
$250
per prospect, refundable
how · A $250 refundable reservation paid by card or ACH at a checkout page linked from the workpaper pack - sized so a partner can pay without a firm vote - with a one-page founding-firm order form signed at payment; the $250 is applied to the first season invoice. set up: Stripe Invoicing ↗
what it reserves · One of 10 founding-firm slots, the $2-per-return price locked through the 2028 season, and a January 15, 2027 go-live date.
refund · Refunded in full on request any time before January 15, 2027, and automatically if Substantia is not processing returns by that date.
target · 8 paid reservations from 20 firm conversations within 30 days
before taking money · IRC 7216 restricts what preparers may disclose about clients, so run every call, demo and workpaper on fictitious records and take no real client return data until counsel approves the consent language.
Go: build it if
8 or more $250 reservations from 20 conversations, and at least 9 of 15 partners on calls saying they will not sign on self-reporting alone: build for the 2027 season.
Kill: stop if
Fewer than 3 reservations from 20 conversations, or 10 of 15 partners saying client self-reporting is fine at these dollar amounts: the card's stated risk is real, stop.
5 Scripts to run itoutreach message, landing copy, deposit terms · click to open
outreach message
You're heading into a 2026 season where every non-itemizing client can claim $1,000 ($2,000 MFJ) in cash gifts, and the 170(f)(8) acknowledgment rules still apply to every one of them. I'm building Substantia, an agent that matches gifts to bank transactions and email receipts, checks each charity's standing on the gift date, and hands you audit-ready workpapers at $2 per return. I'm signing 10 founding firms before January. Do you have 20 minutes this week to tell me how you're planning to handle it?
landing page
Substantiate the new charitable deduction on every 1040, automatically $2 per return buys matched receipts, gift-date charity standing, 170(f)(8) checks, and audit-ready workpapers Reserve a founding-firm slot for the 2027 season - $250, refundable
deposit terms
Your $250 reservation holds one of 10 founding-firm slots for the January-April 2027 season and locks $2 per return through the 2028 season. It is applied to your first season invoice and refundable in full any time before January 15, 2027. If Substantia is not processing returns by January 15, 2027, we refund it automatically.
Would you run this test?
One tap. The yes-share feeds the Demand pillar of this idea's score; nobody sees who answered.
Budgets are out-of-pocket estimates for a team of one to three, US market. Size the deposit to the deal, and check the terms before taking money in a regulated line.
Scorecard
Ranked against every idea in the catalog: trend, demand and 100x potential from the corpus, competition relative to the other ideas. A generated concept has no judges or swipes yet, so its pillars use the data signals only.
63
Idea Score, 0-100 · raw 38.5 x 1.64
Active
competition: more crowded than 65% of ideas · headwind x0.67
+0.0
government priorities, secondary (0 matching grants)
Trend
61
Is the wave forming now? 2025-26 entrants vs 2023-24, rounds since 2025, the sector's live-batch direction, the 2026 trend analyst.
- Entrants 2025-26 vs 2023-24 (similar companies)99
- Rounds announced 2025+ in the sector33
- Sector direction (live batch)50
Demand
65
Does anyone want it? YC's current RFS, companies already paid for something similar, the operator judge, founders' yes-rate in decks, readers who would run the test.
- YC asks for it (current RFS: idea / sector)30
- Someone already pays (similar companies, recent / all-time)100
100x potential
47
Can it return a fund? The venture judge (double weight), market-size and moat axes, neighbours still alive, the technologist judge.
- Neighbours still alive47
Score = 100 x cbrt(Trend x Demand x 100x) x (1 - 0.5 x crowding) + government bonus (max 5), calibrated so the 95th-percentile idea scores 90 (order never changes). A geometric mean: a weak pillar cannot be papered over. Percentiles are among the 382 ideas in the catalog; the terms matched were substantiates, charitable, deduction, cpa, clients, firms, preparing, 2026.
The concept in full
- What
- An agent service for CPA firms preparing 2026 returns: with client permission it reads bank transactions and email receipts, matches each cash gift to a charity that was qualifying and in good standing on the gift date, validates that the acknowledgment meets IRC 170(f)(8), applies the $1,000/$2,000 cap and the itemizer 0.5% AGI floor correctly, and produces workpapers. It also stops fraud before money moves: for clients on year-round advisory, it monitors recurring gifts and flags a charity that loses state or IRS good standing before the next month's gift processes, using standing and filing history rather than the 501(c)(3) letter alone, the letter TIGTA showed four of five fictitious organizations could obtain via Form 1023-EZ.
- Grounded in (2025-2026 signals)
- OBBBA signed July 4, 2025, deduction effective tax year 2026; itemizers lose the first 0.5% of AGI and top-bracket donors get 35 cents per dollar, details preparers must apply. 'cpa firms' is an emerging term: 3 companies in 2025-2026 versus 0 before. Magnetic (yc S25) is building an AI tax preparer for CPA firms, evidence the buyer pays for agents in this workflow. FBI IC3: $96 million lost to fake charities in 2024.
- What it rides
- Universal charitable deduction from 2026: a brand-new line item that 86% of filers will claim for the first time, with substantiation rules their preparers must now enforce at scale.
- Why now
- The first returns claiming the deduction are prepared January to April 2027, so firms are choosing their 2026-season tooling in the second half of 2026, right now, and no incumbent workflow exists because the deduction never existed before.
- Wedge: first customer and entry point
- Ten small CPA firms with heavy 1040 practices; start as the charitable-substantiation module they run alongside their existing tax software, priced per return.
- Closest real companies, as the generator saw them
- Magnetic (yc S25) is a full AI tax preparer for CPA firms; Substantia is the charitable-substantiation and charity-verification layer, narrow enough to plug into any preparer rather than replace one.
- Main risk
- The deduction's substantiation is simple enough at $1,000 that preparers accept client self-reporting and never pay for verification.
Similar startups in the directory
Companies whose pitch matches most of the concept's terms (substantiates, charitable, deduction, cpa, clients, firms, preparing, 2026).
AI Tax prep and accounting software for CPA firms
AI Tax Preparer for CPA firms
Aculis AI is an AI-native OS that automates tasks and enhances insights for wealth management firms.
ZeroDrift makes every message compliant before it's sent. 2x founder (raised $50M). $150K ARR, 50%+ MoM
AI Workforce for Tax Firms from ex Airbnb, Intuit team
AI for accounting
Vertical AI for Audit & Advisory Firms
Financial dashboard for businesses.
Uniforce helps businesses expand sustainably by providing cloud-based and consulting services.
Public money in this direction
US federal grants and open opportunities matched to the concept's terms.
No matching grants or programs tracked; 2 startup-relevant grants exist in Fintech overall.
Other concepts in this collection
- GivewirePay-by-bank donation checkout that replaces the card fee with a flat quarter
- FundamentWhite-label DAF software that lets community foundations drop the 0.60% admin fee
- StewardpayBenevolence bill-pay for congregations that pays the landlord, never the person
- RelieflineSection 139 disaster relief payments as an API for employers and payroll
- ClearalmsHeadless stablecoin acceptance for giving platforms and DAF sponsors under GENIUS
- AlmonerA donor-side giving agent that verifies the charity and pays it directly
- VeribillThe biller confirms the bill before the donor's money moves
- GroundproofOne API call that says the disaster victim and address are real
- DocketlineA benevolence agent that checks the eviction docket and pays the landlord
- ReliefwireVerification that keeps employer disaster relief tax free under Section 139
- NeedcastThe registry of verified needs that giving agents can actually trust
- GoodstandContinuous good-standing and deepfake screening for regulated fundraising platforms
- EmberlineCatches fake disaster campaigns in the first hours, before donations move
- DocketryCasework software for state charity regulators policing platforms and fake charities
- AlmscheckThe verification call a giving agent makes before it completes a gift
- GrantsieveGrantee screening for DAF sponsors that goes beyond the IRS determination letter
- StewardlyAn agent that vets hardship appeals before a church or employer pays
- GivetallyTracks a household's $1,000 charitable deduction and builds the proof automatically
- NetgoodPayroll rails that make the 2026 deduction automatic in every paycheck
- AttestlyReceipts, acknowledgments and good-standing proof for charities facing first-time deductors
- StandwellOne API call telling a checkout or giving agent if this gift qualifies
- GrantonThe DAF grant rail for AI giving agents
- RemitgrantACH grant payment and reconciliation for DAF sponsors still mailing checks
- HostfundWhite-label DAF back office so community foundations can charge zero admin fees
- PayoutlineDAF payout and flow-through reporting for state charity regulators
- BillclearLets DAF dollars pay verified hospital, rent and utility bills legally
- QuickenalmsAn agent that puts your idle DAF balance to work on verified needs
- SteepledBenevolence fund software that pays the landlord, not the parishioner
- VeripleaScreens disaster appeals for deepfakes and fake organizers before funds open
- CommonhearthFiscal host software so community foundations can shelter mutual aid groups profitably
- FoundwatchGives state charity regulators radar on pop-up disaster funds
- PayvouchAn agent that confirms the bill with the biller, then pays it directly
- GranformAn AI grant officer for nonprofits that lost the staff who did compliance
- HearthhostFiscal sponsorship software so community foundations can host groups at cost
- SteadygiveConverts a defunded nonprofit's mailing list into recurring direct ACH donors
- ParishlineHardship programs for congregations that pay the landlord, not the person
- ReliefrailEmployee hardship grants through payroll, paid to verified billers
- ServestackRuns state service programs that can no longer count on a federal partner
- AckfoldEvery small gift receipted and deduction-ready for the new $1,000 write-off
- ChainstubTurns stablecoin gifts into IRS-grade receipts and proof the dollar arrived
- VouchlineA verification agent for employer disaster grants that pays bills, not people
- GrantechoProof a DAF grant landed and did something, sold to sponsors
- NeedstackPublishes a nonprofit's verified needs as a catalog giving agents can read and pay
- GrantscripScoped payment tokens and signed consent records for donations an agent initiates
- GrantportSponsor-side software that takes grant recommendations from donors' giving agents
- VetgateFraud pre-flight API a giving agent calls before any money moves
- BenevosBenevolence agent for congregations that pays verified bills instead of people
- DocketHoursCommunity service hours that courts accept without paper logs
- BenchfillAn agent that staffs gutted nonprofits with verified pro bono professionals
- PalletProofProof of delivery and IRS paperwork for donated goods
- MusterBack-office software for states running service corps without AmeriCorps
- MatchStubVerified volunteer hours that release employer match dollars
- KindsigScreens volunteer and goods appeals before your congregation responds
Fictional concept generated 2026-08-26 by claude-fable-5 from the collection's brief and MarkosWeb data. Treat it as a research prompt, not a plan.