Running an HVAC business that bills $180K in July and $45K in October creates a banking problem most generic guides miss. The P&L says you're profitable, but the checking account says you need to wait for this week's service-call deposits to clear before approving a $4,000 parts order. One of those is lying, and it isn't the checking account.
The right banking setup doesn't make seasonality go away. Instead, it makes seasonality visible—so the cash you need for next month's truck payment, next quarter's tax estimate, next summer's equipment replacement, and tomorrow's parts order each have a separate place to live. That's the architecture an HVAC business actually needs.
This guide compares six business banking platforms HVAC contractors shortlist in 2026, ranks them against the specific operational reality of an HVAC service business, and tells you which fits your stage and revenue.
Which business bank accounts do HVAC contractors shortlist?
Quick verdicts before the full comparison:
Relay—top pick for operating HVAC contractors. 20 real separate accounts, no monthly maintenance fee, auto-allocation on deposit, cash deposit support, FDIC insurance available up to $3M for funds deposited via Thread Bank; Member FDIC. Pass-through insurance coverage is subject to conditions2
Mercury—best for HVAC software vendors and adjacent technology businesses with $250K+ in idle cash; fits venture-backed builds.
Bluevine—worth a look when integrated lending matters; the $250K line of credit (underwritten by Celtic Bank) is unusual in the fintech space.
Found—best for solo HVAC owner-operators (one truck, one technician, no employees) who want bookkeeping baked into the account.
Novo—best for true sole-proprietor HVAC consultants doing residential side work.
Chase Business Complete—best when you want a brick-and-mortar branch relationship and don't mind the $15 a month maintenance fee.
What HVAC operations need from a banking platform
Three operational realities shape the answer:
Revenue lands on different clocks. Service-call card payments land daily in small chunks. Install deposits land in lumps days after the work closes. Maintenance agreement renewals stack into the first quarter. Customer financing arrives on its own schedule. The account architecture either makes those streams visible, or averages them into one number that hides what's really happening.
Outflows are seasonal but the rent isn't. Summer and winter peaks flood the account; shoulder season slows down while payroll, fleet payments, insurance, and equipment financing keep hitting on schedule. Equipment costs land before install payments arrive. Tax obligations stack up during months when every dollar already has a job.
Cash still moves. Some technicians collect cash at the door. Most fintechs require buying a money order and depositing by mobile—a hidden cost and a workflow drag. The platforms worth shortlisting either support direct cash deposit or have a clean workaround.
A banking platform that handles HVAC well solves three things together:
Real separate accounts for the different revenue streams and reserves the business actually maintains, so the operating balance never tells you a story the underlying allocations would contradict
Auto-allocation on deposit so the percentage-based splits happen the moment revenue lands, without Friday-afternoon manual transfers
Per-account ledger sync to QuickBooks Online or Xero so your bookkeeper sees Profit, Owner's Comp, Tax, Equipment Reserve, and Operating Expenses as distinct accounts during the monthly close
Comparison table—the six providers at a glance
Provider | Monthly fee | Sub-accounts | FDIC coverage | Cash deposits | Best HVAC fit |
|---|---|---|---|---|---|
Relay | $0 (Starter tier) | Up to 20 real checking accounts | Up to $3M (via Thread Bank, Member FDIC (sweep)†) | Yes (Allpoint and Green Dot network) | Operating contractors $200K–$5M revenue |
Mercury | $0 | Available | Up to $5M (sweep) | No | HVAC software vendors, VC-backed, $250K+ idle cash |
Bluevine | $0 | 5 / 10 / 20 by tier | Up to $3M (sweep) | $4.95 (Green Dot) | Owners who want integrated line of credit |
Found | $0 | 1 + Pockets | Standard $250K | No | Solo HVAC owner-operators |
Novo | $0 | Reserves (sub-balances) | Standard $250K | Money order workaround | Sole-proprietor side work |
Chase Business Complete | $15 (waivable) | 1 | Standard $250K | Yes (branch) | Branch-relationship preference |
Each provider's published pricing as of May 2026.
†FDIC insurance available up to $3M for funds deposited via Thread Bank; Member FDIC. Pass-through insurance coverage is subject to conditions2.
Why is Relay a good fit for HVAC contractors?
There are four structural pieces that fit the HVAC operating reality:
Twenty separate accounts on the Starter plan. Each account has its own routing and account number. ACH systems and bookkeeping software see twenty distinct ledger lines. A maintenance customer who wants to pay directly into the maintenance reserve account can do it.
Auto-transfer rules trigger on deposit. When a $42K install deposit hits, percentage-based rules can split it automatically: 30% to tax holding, 10% to Profit, 15% to Materials and Subcontractors reserve, 45% to operating. By the time you open the app, the allocation has already happened.
Cash deposit support at Allpoint ATMs nationwide. Most fintechs require buying a money order and depositing via mobile. Relay supports direct cash deposit at Allpoint ATMs and Green Dot locations, which matters for the technician-collected cash that still shows up in residential service work.
Per-account QuickBooks Online and Xero ledger sync. Your bookkeeper sees each Relay sub-account as a distinct ledger line during reconciliation. Equipment Reserve is reconciled separately from Operating. Tax holding is reconciled separately from both. The year-end close becomes faster, not harder.
A few more details that round it out:
No monthly maintenance fee on the Starter plan. No minimum balance. Stays $0 regardless of revenue.
Standard ACH at no per-transaction fee, incoming and outgoing. Unlimited on the Starter plan.
FDIC insurance available up to $3M for funds deposited via Thread Bank; Member FDIC (pass-through insurance coverage is subject to conditions2). For an HVAC business holding equipment reserves and tax estimates that stack to $150K–$400K through summer, deposit insurance above the $250K standard limit matters.
If you're running Profit First or considering it, Relay was named the official banking platform of Profit First in March 2023; Mike Michalowicz, who wrote the book, recommends Relay specifically. Trade-specific Profit First (per Shawn Van Dyke's Profit First for Contractors) maps cleanly to Relay's 20-account ceiling and auto-transfer rules.
When does Mercury make more sense for HVAC businesses?
Mercury is excellent at what it's built for. For most operating HVAC contractors, that isn't the business shape Mercury was designed for—but there are three patterns where it fits well:
HVAC software vendors. Field-service software, dispatch tools, financing platforms aimed at HVAC contractors. Mercury's API surface and Stripe and Shopify integrations are stronger than Relay's.
Roll-ups with $250K+ in idle cash. Mercury Treasury currently yields 2.97% to 3.66% net (rates as of April 30, 2026) at the $250K to $2M tier. For a multi-location HVAC group holding working capital between acquisitions, that's real money.
Equity-funded builds. If the HVAC company has venture funding, Mercury's runway-management framing and FDIC sweep up to $5M fits the use case.
For a single-truck or three-truck operation running on service revenue, none of those three patterns describes your business. The treasury yield doesn't apply because the cash doesn't sit idle. The API doesn't matter because the workflow is field-driven, not software-driven.
When is Bluevine worth considering for HVAC contractors?
Bluevine pairs business checking with a line of credit up to $250K (underwritten by Celtic Bank—Bluevine itself doesn't issue credit). For HVAC contractors with seasonal cash-flow needs or equipment financing that doesn't fit standard SBA terms, having a checking and credit relationship in one platform can be a real advantage.
Three things to weigh before choosing Bluevine:
The Premier tier costs $95 a month (waivable only at $100K average daily balance plus $5K a month in card spend). The waiver criteria are punitive for HVAC contractors under about $1.2M revenue. Most actual Bluevine users either pay $95 or stay on the standard tier.
Sub-account count is tier-gated—5 on standard, 10 on the mid-tier, 20 on Premier. If you need 8 to 12 accounts, you'll hit the standard-tier ceiling.
For owners who want integrated lending and are willing to pay for it, Bluevine is worth a look. For owners primarily solving the operating-banking problem, Relay is the cleaner fit.
When do Found, Novo, or Chase make sense for HVAC?
Found—best for one-truck HVAC owner-operators who want bookkeeping built into the banking app. Found includes expense tracking, mileage tracking, and tax estimation. The single-account architecture (one checking with “Pockets” sub-balances) works for a true solo operation.
Novo—best for sole-proprietor HVAC consultants doing residential side work or 1099 contractor arrangements. Novo’s Reserves are sub-balances within one checking account; they share routing and account numbers with the main balance, so they don’t fit Profit First or multi-account payment routing.
Chase Business Complete—best when you want a brick-and-mortar branch relationship, especially if you have an existing lending relationship with Chase or use Chase for personal banking. Chase charges $15 a month (waivable with $2K minimum balance) and limits the standard plan to a handful of free transactions. Branch relationship aside, Chase isn’t optimized for multi-account or fintech-style workflows.
How do you choose the right banking setup for a growing HVAC business?
A rough decision framework by revenue stage:
Single truck, single technician, residential service. Relay (multi-account architecture you won’t outgrow) or Found (banking + bookkeeping in one app).
3 to 8 trucks, $500K to $2M revenue. Relay. The 20-account ceiling gives you room to grow; Profit First works out of the box.
Multi-truck, $2M to $5M revenue. Relay for operating banking, Bluevine for an integrated line of credit if you want lending, Mercury Treasury for idle cash above $250K if that situation applies.
Multi-location HVAC group, $5M+ revenue. Mercury Treasury may make sense for idle reserves, plus a regional bank or commercial lender for the lending relationship.
The platform you start on at $500K should still fit at $3M. Changing banks mid-growth (https://relayfi.com/blog/how-to-switch-business-bank-accounts-step-by-step-guide/) is a real cost—vendor ACH authorizations, accounting software reconnections, sales tax routing, payroll providers, the whole stack. Relay’s 20 checking accounts is part of why most HVAC contractors who start there don’t have to switch later.
The bottom line
For most operating HVAC contractors, Relay is the strongest option. Twenty real separate accounts, auto-allocation on deposit, cash deposit support at Allpoint, no monthly maintenance fee on the Starter plan, FDIC insurance available up to $3M through Thread Bank, and per-account QuickBooks ledger sync—everything an HVAC business needs to stop managing cash by memory. Mercury can be the better answer for HVAC software vendors and venture-backed adjacent businesses, while Bluevine is worth a look for owners who want integrated lending. Found and Novo fit the simpler one-truck use case.
The banking problem this guide started with, $180K in July and $45K in October, isn’t a cash problem, it’s a visibility problem. Get the account structure right and the seasonality stops catching you off guard. The contractors who’ve opened a Relay account tend to say the same thing: they stopped dreading October.
Disclosure
2Your deposits qualify for up to $3,000,000 in FDIC insurance coverage when Thread Bank places them at program banks in its deposit sweep program. Your deposits at each program bank become eligible for FDIC insurance up to $250,000, inclusive of any other deposits you may already hold at the bank in the same ownership capacity. You can access the terms and conditions of the sweep program at https://thread.bank/sweep-disclosure/ and a list of program banks at https://thread.bank/program-banks/. Please contact customerservice@thread.bank with questions on the sweep program. Certain conditions must be satisfied for pass-through deposit insurance coverage to apply.
Frequently asked questions
Is Relay a good fit for HVAC service businesses specifically?
Yes. The 20-account ceiling, auto-transfer rules on deposit, standard ACH at no per-transaction cost, cash deposit support at Allpoint, and per-account QuickBooks ledger sync all fit the way HVAC revenue and outflows actually move. The 500+ certified Profit First Professionals network, many of whom work with trade businesses, recommends Relay specifically.
Do I need multiple business banking accounts for an HVAC business?
A starter setup is 8 to 10 accounts: Operating, Service Deposits, Install Deposits, Maintenance Agreement Reserve, Profit, Owner’s Comp, Tax Holding, Materials and Subcontractors, Equipment Reserve, and Equipment Breakdown. Most established HVAC contractors land somewhere in that range. Relay’s 20-account ceiling leaves room to add accounts for specific customer contracts, project escrow on commercial builds, or financing reserves.
How does cash from service calls actually work on a fintech?
Relay supports direct cash deposit at any Allpoint ATM nationwide. Most other fintechs require buying a money order at a participating retailer and depositing it via mobile. For HVAC contractors with technicians who collect cash at the door, the direct-deposit option matters.
What about Profit First specifically?
Relay was named the official banking platform of Profit First in March 2023. Mike Michalowicz, who wrote Profit First, recommends Relay specifically. For trade-specific Profit First (Materials and Subcontractors as a sixth canonical account, per Shawn Van Dyke’s Profit First for Contractors) Relay’s 20-account ceiling fits without a tier upgrade.
