Payroll, job costing and WIP that follow your crews across the state line
A crew pours in Missouri on Tuesday and sets steel in Kansas on Thursday, and payroll has to follow them. That is why construction accounting in Missouri starts with work location: the state holds no reciprocity agreement with Kansas or Illinois, so withholding, unemployment insurance and nexus all turn on where the hours were worked, not where your office sits. Kansas City and St. Louis then add an earnings tax on wages earned inside city limits. A generalist bookkeeper runs the whole payroll off one address and it is wrong every week. We code labor by the job, so job cost, withholding and certified payroll agree.
On the ground
The Gateway Arch and downtown St. Louis, Missouri
Missouri is not one construction market, it is two border markets with a large rural state between them. Kansas City sits on the Kansas line and runs on logistics: rail, intermodal, distribution and warehouse work, plus the animal health corridor that stretches west across the border. St. Louis sits on the Illinois line and runs on institutions: hospital systems, university and campus construction, aerospace and defense work, and a historic rehabilitation pipeline that is one of the deepest in the country.
Between them, the pattern changes completely. MoDOT keeps a steady highway and bridge program moving across the state, and agriculture and food processing generate facility work in places with no metro anywhere near them. Springfield and Columbia carry their own regional commercial, healthcare and university demand. A contractor who works both metros and the corridor in between is running jobs under conditions that have almost nothing in common except the state income tax return at the end of the year.
The financial consequence is that Missouri work is jurisdiction-heavy in a way that surprises contractors moving here from states with a single licensing board and a uniform tax rate. There is no state general contractor license, so every city and county is its own registration. Combined sales tax rates vary widely from municipality to municipality, so the same pallet of material costs differently depending on which yard you bought it from. And on the border, the crew that moved to a job twelve miles away has just changed states.
Labor is worth naming honestly too. Missouri passed a right-to-work statute in 2017 that voters rejected at referendum the following year, so it never took effect, and both metros carry a strong union presence alongside open shop work in the outstate market. Plenty of Missouri contractors run both, which means two fringe structures and two cost profiles inside one company. All of it is workable, and our contractor turnaround stories show what the rebuilt version looks like. It just cannot be run out of a bookkeeping setup that assumes one state, one rate and one set of rules.
They didn’t just record transactions and call it a day. They built a custom chart of accounts around how a remodeling company actually runs, did a full catch-up on years of bookkeeping inside QuickBooks Online, and now stay on top of my monthly bookkeeping and payroll. Every step, they broke it down in simple terms instead of burying me in accountant talk.
FinTruction rebuilt the whole thing from the ground up, with real job costing, work in progress, and retainage. They didn’t just hand me reports and disappear; they walked me through my numbers until I understood them.
Sahil and his team handle the bookkeeping and job costing for my painting business. They cleaned up my books and set up integrations that give me accurate, timely job costing with solid weekly data. Reliable, detailed, and genuinely invested in getting the numbers right.
FinTruction is the only bookkeeping team we’ve found that truly understands construction accounting and WIP reporting. They aligned our income and costs across 21 jobs and gave us full, monthly transparency. Fast, accurate, and an indispensable partner.
When I came to FinTruction I had no financial structure. No job costing, no WIP tracking, books behind. They did a full cleanup and rebuilt job costing and WIP tracking in QuickBooks. Now I know what’s billed, what’s owed, and where every job stands.
A couple of minutes from a contractor we support, sharing what working with FinTruction has been like and what changed once their numbers finally made sense.
This is the problem Missouri contractors call us about first. Hours are captured against a job, the job carries its state and municipality, and withholding, earnings tax and unemployment reporting all follow the hours rather than the office address. Fix that once and half the year-end mess disappears with it.
Every construction platform claims to have a "QuickBooks integration." Most break the moment your books need to be accurate. Sales tax mismaps, retainage disappears, change orders create duplicates, and job costing reports stop matching project reality. We fix the integration so your software, your books, and your job‑level numbers all tell the same story.
Also work with Foundation, Sage 100, Bill.com, ADP, Gusto, Ramp, and more. See all platforms we integrate →
A contractor working statewide is working under a different permit office, a different combined sales tax rate and sometimes a different state on every job. Cost codes have to carry that context, otherwise margin comparisons between jobs are comparing two different cost structures and calling the difference performance.
Missouri runs its own prevailing wage law through the Department of Labor and Industrial Relations, with rates set by county and occupational title in an annual wage order. MoDOT and federally assisted work brings Davis-Bacon alongside it. The certified payroll you file and the labor cost in your job report have to be the same numbers.
An underbilling is money you have already spent and not yet asked for, and it hides best on long contracts. We prepare a monthly work in progress schedule comparing cost to date against the current estimate, calculate earned revenue on percentage of completion, and keep retainage receivable and payable out of ordinary receivables where a surety can see it.
Deciding whether to chase work on the far side of a state line is a financial decision before it is an operational one, because it registers you somewhere new and changes your payroll. Our controller services and CFO services cover what you can carry and what a job will do to cash before it pays.
Missouri is a border state twice over. Its two largest construction markets sit on state lines, its licensing is local rather than statewide, and its sales tax rate changes from one municipality to the next. Generic bookkeeping treats all of that as one address and one rate.
A general bookkeeper can record transactions. Construction accounting is a different job.
| What you need | Generic local bookkeeper | FinTruction |
|---|---|---|
| Job-level costing | Lumps all jobs into one P&L | Cost codes and margin per project |
| WIP & revenue recognition | Cash-basis, no WIP schedule | Monthly WIP with over/underbilling |
| Retainage tracking | Buried in AR/AP, often missed | Tracked receivable & payable by contract |
| Bonding & lender packages | Not equipped to produce them | Bonding-ready statements and backlog |
| Construction software | QuickBooks set up like a retail shop | QuickBooks + integrations tuned for contractors |
We support contractors across the state, from logistics and distribution builders in the Kansas City metro to healthcare, campus and historic rehab crews in St. Louis and highway work along the MoDOT system.
Running a Construction Company in Missouri?
Get Your Free Audit
Missouri does not maintain reciprocal income tax agreements with Kansas or Illinois, so there is no certificate a construction employee can file to make the second state disappear. Wages are sourced to the state where the work was performed, and the resident state gives a credit for tax paid elsewhere. Working across the line also creates genuine nexus questions for the company itself. All of it depends on hours being coded to a job and the job carrying its state, which is a payroll and job costing design decision, not a year-end tax exercise.
Both cities impose a one percent earnings tax on wages earned for work performed inside the city limits, reaching business net profits attributable to the city as well, and St. Louis adds a payroll expense tax on employers. These are work-location taxes. A suburban contractor still owes on the hours its crews put in downtown, and a city-based contractor does not owe on hours worked in the county. Withholding off the office address is the single most common payroll error we find on Missouri files, and it runs in both directions.
Public works in Missouri fall under the state prevailing wage law, administered by the Department of Labor and Industrial Relations through the Division of Labor Standards, which publishes an annual wage order setting rates by county and occupational title. The law applies above a statutory dollar threshold, with smaller public projects covered by a separate public works minimum wage. Federally assisted work adds Davis-Bacon obligations on top. The accounting task is making the certified payroll and the labor cost in job cost come out of one payroll run so they cannot drift.
Missouri has no state general contractor license. Licensing, registration, bonding requirements and permitting sit with cities and counties, which means a contractor working across a metro is managing a portfolio of separate registrations, fees, renewal dates and inspection regimes. These are real costs of doing business and belong in your overhead rate. When they are booked as miscellaneous expense, the overhead rate is understated and every bid built on it is quietly light before the first hour is worked.
Missouri generally treats the contractor as the consumer of materials it furnishes and installs into real property, so tax is paid on purchase rather than charged to the owner. The difficulty is rate variation: county, city and special district taxes stack on the state rate, and the combined rate can differ meaningfully between two suppliers within the same metro. On projects owned by exempt entities, a project exemption certificate can allow qualifying purchases to be made tax free. We record tax at the rate actually paid and keep the exemption paperwork attached to the job.
Missouri gives contractors, subcontractors and suppliers lien rights, with a filing window measured from when the work was last performed and notice requirements that differ depending on your tier and the property type. Missouri also has prompt payment provisions and limits on retainage held on public works. We are not attorneys and we do not file notices. What we do is keep unpaid amounts organized by job, tier and date so the deadline calendar runs off real data and your attorney has the backup the same day they ask.
Missouri levies a corporate income tax and a graduated individual income tax that reaches pass-through owners, so entity choice genuinely moves the number for a contractor. Separately, the state historic preservation tax credit stacks with the federal rehabilitation credit and drives a large share of St. Louis renovation work. Both credits turn on qualified rehabilitation expenditures, which have to be segregated from non-qualifying costs as they are incurred. Rebuilding that split at the end from invoices is how credit claims get cut.
A fair question if you already have a bookkeeper, a payroll service and a CPA. Here is the honest answer.
Most Missouri contractors do not need new software. They need what they already pay for configured for construction and connected to the accounting, so multi-state payroll and compliance reporting come out of the normal week rather than out of a second job.
Most QuickBooks files we inherit were configured for a business that sells products from one location. For a Missouri contractor that means jobs are customers, cost codes do not exist, every employee is coded to the office address, and retainage sits inside receivables where nobody chases it.
Is your QuickBooks file working against you?
If your project managers already track budgets, commitments and change orders in a construction platform, the office should not be typing it again. We connect the field system to the accounting so the numbers agree and the month does not open with an argument about whose figure is right.
One set of numbers that the field and the office both believe.
Once the systems are connected, reporting stops being a history lesson. These are the reports Missouri contractors use to decide what to chase and what to walk away from:
See how we have done this for other contractors in our construction accounting case studies.
Because the state line runs through the middle of the work. Kansas City straddles the Kansas border and St. Louis sits on the Illinois border, so a Missouri crew can put hours in two states inside one pay period without anybody thinking of it as out-of-state work. That single fact drives withholding, unemployment insurance, income tax apportionment and nexus. Both metros then add a local earnings tax on wages earned inside city limits. None of it is optional, none of it is handled by a default payroll setup, and all of it lands in the accounting before it lands anywhere else.
We treat work location as a payroll field rather than an afterthought. Hours are captured against a job, the job carries its state and municipality, and withholding follows the hours. This matters more in Missouri than in most states because Missouri does not maintain reciprocal income tax agreements with Kansas or Illinois. There is no form an employee signs to make the other state go away. Instead the resident state gives a credit for tax paid to the state where the work happened, which only works if the wages were split correctly in the first place.
Yes, for the hours actually worked inside the city limits. Kansas City, Missouri and St. Louis each levy a one percent earnings tax on wages earned for work performed in the city, and both reach business net profits attributable to the city as well. St. Louis also imposes a payroll expense tax on employers. These are work-location taxes, not office-address taxes: a contractor headquartered in the suburbs still owes on the hours its crews spend downtown, and a city-based contractor does not owe on hours worked out in the county. We allocate wages by job site so the withholding and the remittance both hold up.
One state, not both. Unemployment insurance does not split the way income tax withholding does. A worker's wages are reported to a single state, chosen by the localization of work test that the states apply in sequence: where the work is localized, then the base of operations, then the place of direction and control, then the worker's residence. Missouri contractors who report a traveling employee to whichever state they happened to be in that week end up with duplicate wage bases, overpaid tax and correction notices from both. We apply the test once per worker and keep the reporting consistent all year.
No. Missouri has no statewide general contractor license. Licensing, registration and permitting sit with individual cities and counties, which makes starting cheaper and running harder. A contractor working a metro of any size carries a stack of separate registrations, each with its own fee, renewal date, bond or insurance requirement and inspection process. Those costs are real overhead. When they are booked as miscellaneous expense, your overhead rate is understated and every bid built on it is quietly light before the first hour is worked. We track them by jurisdiction with renewal dates attached to the record.
Yes, on public works covered by the Missouri prevailing wage law, which is administered by the Missouri Department of Labor and Industrial Relations through its Division of Labor Standards. The Division issues an annual wage order setting rates by county and occupational title. The law applies to public works above a statutory dollar threshold, with smaller public projects falling under a separate public works minimum wage instead. Contractors must keep the payroll records and file the certified payroll the awarding body requires, and federally assisted work adds Davis-Bacon obligations on top. We produce certified payroll and job cost from the same payroll run so the two cannot disagree.
Missouri generally treats the contractor as the final consumer of materials it incorporates into real property, so tax is paid at purchase rather than charged to the owner. The complication is the rate. Missouri layers county, city and special district taxes on top of the state rate, and the combined rate can swing several percentage points between two suppliers a short drive apart. Where an exempt entity is the owner, a project exemption certificate can allow qualifying purchases to be made tax free. We capture the tax in job cost at the rate actually paid and keep the exemption documentation with the job.
Yes, and they need cost records built for the credit rather than reconstructed for it. St. Louis has one of the largest historic rehab pipelines in the country because Missouri operates a state historic preservation tax credit that stacks with the federal rehabilitation credit. Both turn on qualified rehabilitation expenditures, which means the qualifying work has to be segregated from the non-qualifying work in the job cost as it is incurred. Doing that at the end from a shoebox of invoices is where credits get reduced. We set the cost codes up so the split is a by-product of normal coding.
All of Missouri, plus the parts of Kansas and Illinois your crews cross into. We work with contractors in the Kansas City metro, the St. Louis metro and the Metro East, Springfield, Columbia, Jefferson City, Joplin, Cape Girardeau, St. Joseph and the outstate counties in between, including contractors running MoDOT highway and bridge work and agricultural and food processing builds. Our work is fully remote, so you get a construction accountant and a construction CPA reviewing the file without paying for an office you would never visit.
Start with the free Audit. Send your current file and your most recent job profitability or WIP report, and we will tell you what is wrong, what it is costing you and what it would take to fix. If your crews cross a state line we will also look at how wages are being split and whether the earnings tax is being withheld on the right hours. There is no obligation. After that it is a flat monthly fee based on transaction volume, active jobs and reporting needs, so asking a question does not start a clock.
FinTruction provides construction accounting and construction bookkeeping across Missouri. Select your market below for job costing, WIP reporting and contractor bookkeeping support where your crews are actually working.
Not Seeing Your City?
We serve contractors across all of Missouri. View all locations →
Send us your current file and your last job profitability report. We will tell you what is wrong with it, what it is costing you, and whether your wages are being split correctly on every job that crosses a line. No charge and no obligation for the Audit.
Looking for professional construction accounting in Missouri? Fill out the short form below and our contractor bookkeeping team will contact you within 24 hours.
