Cash Flow Scenario Builder from CSVs
an owner or bookkeeper who currently answers “will we have enough in week seven” by squinting at a spreadsheet and hoping.
Give it your expected invoice payments, your bills and payroll, and today’s balance, and it runs your cash forward 13 weeks, marks in red any week the running balance dips below zero, and carves out a tax reserve at 25% of projected profit so you’re not spending money you’ll owe.
$119 one time. There’s an optional $19 a month add-on. Buy the base once and the tool and every forecast you make are yours to keep.
The week you run out and don’t see coming
Cash-flow trouble almost never arrives as a surprise on the day. It’s visible weeks ahead if you bother to lay the timing out, but laying it out means a spreadsheet with dates and running totals that you have to rebuild every time a payment slips. So most owners don’t, and the first real signal is payroll week feeling tight.
The cost of not looking isn’t just the scramble. It’s the decisions you make blind, taking a job you can’t float or skipping one you could have funded, because you never mapped the next quarter’s cash. A forecast you can regenerate in a minute changes that from a chore into a habit.
Parse, project, flag, reserve
- It reads your inflows and outflows from CSVs, dates and amounts, running each figure through a currency parser that handles dollar signs and reads a parenthesized number as negative.
- It buckets every event into a week from your start date across the horizon, nets each week, and carries the running balance forward from your opening cash.
- It marks the gaps and sets the reserve, flagging any week that goes negative and computing a tax set-aside as a quarter of projected net income, never triggering a reserve on a projected loss.
What it hands you
- A
forecast.htmlyou open in any browser: an inline chart of the weekly balance with the gap weeks in red, plus a week-by-week table, all self-contained with nothing loaded from the internet. - A
CASH_FORECAST.mdlisting every week and calling out exactly which ones dip below zero. - A
TAX_RESERVE.mdshowing projected net income, the reserve, and what’s left after you set it aside, so the tax bill stops being a spring surprise. - A stress-test switch that shaves a chosen percentage off every inflow, so you can see the picture if your receivables come in slow.
- A
cashflow.jsonfor anyone who wants to take the numbers further.
Who it fits, and who it doesn’t
Owners and bookkeepers who can list their expected money in and out and want a clear runway without wiring up a live financial platform.
Not for you if you need a forecast that pulls straight from your bank and updates itself as transactions clear. This works from CSVs you provide, which means the picture is exactly as current as your last export. If hands-off live syncing is what you’re after, a connected tool fits better.
What it replaces, and what those do better
A DIY spreadsheet cash-flow model, a subscription forecasting app like Float or Pulse, and your accountant’s ad-hoc projection. Those apps are genuinely better at staying current, since they sync to your accounting and refresh without you lifting a finger. Your accountant is better at the assumptions, at knowing which client always pays late.
What none of them give you for a one-time price is a private, offline forecast you can rerun from your own files, with the gap weeks and the tax reserve done for you. This is the honest napkin math, mapped out and dated.
Where the projection stays
It runs on your machine. The CSVs are read locally and never uploaded, and the only writes are the forecast files under your output folder, at 0600 permissions, with every value that lands in the HTML escaped so a stray character in a source file can’t break the page.
Your forward cash position and your receivables timing are about as private as business data gets, and here they stay a file on your disk. Buy the tool and it keeps working whether or not you take the monthly add-on.
$119 once, and the first forecast
Point it at your inflows, your outflows, or both, set the opening balance and optionally a start date and horizon, and run it. The forecast opens in a browser in about a minute. Update the CSVs and rerun whenever a payment moves.
Security and privacy
Handles client bank/invoice/payroll data (dates, counterparties, amounts). Security is designed in.
Principles
– Local-first. INFLOWS_CSV/OUTFLOWS_CSV are read from disk and never transmitted anywhere; nothing in this tool touches the network. Nothing is uploaded, no telemetry, no cloud dependency.
– Non-destructive. Source CSVs are only read, never modified or deleted.
– Least privilege. Reads INFLOWS_CSV/OUTFLOWS_CSV, writes only under OUTPUT_FOLDER.
Protections implemented (v0.1.0)
– Path-traversal defense — every output filename is sanitized (safeSegment) and every write is checked with assertWithinRoot(), so the forecast can’t be written outside OUTPUT_FOLDER.
– Fail-fast config validation — clear errors for missing OUTPUT_FOLDER, missing both INFLOWS_CSV/OUTFLOWS_CSV, an invalid STARTING_BALANCE/WEEKS/TAX_RATE/INFLOW_ADJUST_PCT, or an unparseable START_DATE, all before any file is touched.
– Restrictive permissions — the generated forecast.html, CASH_FORECAST.md, TAX_RESERVE.md, and cashflow.json are written 0600.
– HTML-escaping — every value that flows into forecast.html (the title) is HTML-escaped, so hostile input in config renders inert rather than executing; the SVG chart and table are built from numeric fields only.
– Defensive parsing — the CSV parser and currency parser never throw on malformed input (missing fields default to empty string, unparseable amounts default to 0); rows with an unparseable date are excluded from the projection rather than crashing the run.
– No reserve on a loss — the tax reserve is max(0, net income) * TAX_RATE, so a projected loss never produces a negative or misleading reserve figure.
– Secrets discipline — .env and generated Forecasts/ output are git-ignored; no secrets or client data in the repo.
Distribution / AV trust
Known limitations / roadmap
– Weekly resolution only in v0.1.0; large one-off events land in whichever 7-day bucket they fall into rather than a finer daily view.
– Bucketing relies on JavaScript’s Date parser — highly unusual date formats may not parse and will silently drop that row from the projection.
– Only one scenario (one INFLOW_ADJUST_PCT value) per run; comparing multiple stress-test scenarios side by side is on the roadmap.
Reporting
Report suspected vulnerabilities privately to the maintainer before public disclosure.
Frequently asked questions about Cash Flow Scenario Builder from CSVs
What is a cash flow scenario builder from CSVs and how does it work?
A cash flow scenario builder from CSVs is a tool that turns the plain data files you already have into a forward look at your money. You export your bank activity, your open invoices, and your payroll to CSV, import those files, and the tool assembles a rolling forecast from them. Instead of a static bank balance that only tells you today, you get a moving picture of the weeks ahead. It projects when cash comes in, when it goes out, and where the two lines cross in a way you would rather know about early. That is the whole idea. Take the records you produce anyway and read the future that is hiding inside them.
The work happens in three steps that map to how an owner actually thinks. First you export your bank, invoice, and payroll data to CSV, which every accounting tool and bank can do. Second you import those files and the tool builds the scenarios, matching expected inflows against known outflows. Third you read the result, which flags upcoming cash gaps, accounts-receivable risk where a customer is slow to pay, and a tax reserve estimate drawn from your real numbers. You are not asked to model anything by hand or learn a forecasting language. The tool does the arithmetic and you make the calls.
Because it runs on files rather than a live account link, the whole thing stays close to you. There is no request to hand over a banking password or connect a permanent feed. That design choice fits owners who are careful about their financial data, and it lines up with the way the U.S. National Institute of Standards and Technology frames security work, starting with understanding what you hold and where the risk sits, as laid out in the NIST Cybersecurity Framework. Keeping the analysis on your own files is one fewer place your numbers can leak.
What makes the scenario part useful is that it is not a single guess. You can ask what happens if a big invoice pays late, if a slow month arrives, or if you take on a new fixed cost. The tool redraws the forecast so you see the effect before you commit. For a small operator, that turns cash planning from a nervous feeling into a set of concrete pictures you can compare. You stop running the business on the current balance and start running it on where the balance is headed. The product page shows the import and scenario flow in detail. The short version is that a cash flow scenario builder from CSVs gives a busy owner a clear, private, forward view of their money without a bank login, a subscription to a heavy platform, or a finance degree. You feed it the files, it hands you the picture, and you get to plan instead of react. That head start is often the difference between covering a gap calmly and scrambling for it. And because the forecast is rebuilt from your own exports each time you import, it stays honest about where the business really stands rather than drifting away from reality between updates. An owner who checks it once a week is never more than a few days from a current view.
How does the tax reserve feature help me plan for what I owe?
One of the quiet ways small businesses get hurt is spending money that was never really theirs. Sales come in, the account looks healthy, and then a tax bill arrives that should have been set aside months earlier. The tool addresses this directly by estimating a tax reserve from your actual transaction data as it builds the forecast. Rather than guessing a percentage or waiting for your accountant to sound the alarm, you see a running figure for what to hold back, based on the money you have really taken in.
This matters because a lot of that incoming money is reportable income you will owe on. Payments you receive for goods or services, including the card and third-party-network payments summarized on a 1099-K, are income the IRS expects to see accounted for, as its guidance on understanding your Form 1099-K explains. The tool does not file anything for you, but by reading your bank and invoice CSVs it can show the shape of your taxable inflows and translate that into a reserve you keep aside. When the bill comes, the money is there instead of gone.
The reserve estimate updates as you import fresh data, so it tracks a real year rather than a flat assumption. A strong quarter raises the amount you should hold back. A slow stretch lowers it. That responsiveness is the point, because a fixed rule of thumb either sets aside too little in good months or strands cash you needed in lean ones. By tying the reserve to your genuine numbers, the cash flow scenario builder from CSVs keeps the figure honest and current. You are planning against what happened, not against a hopeful average.
There is a recordkeeping payoff as well. The same imported files that feed the reserve also give you an organized trail of income and outflow, which is exactly the kind of support you want behind a return. Keeping those records is not optional for a business, and having them assembled as a side effect of forecasting makes the obligation lighter to carry. This is built for owners without a back office, the kind of operators covered on the small-business operators page, who have to be their own finance department after hours. The reserve feature is meant to do one plain thing well. Take the money you have actually earned, estimate what a share of it belongs to taxes, and keep that number in front of you so it does not get spent by accident. For an owner, seeing the reserve grow alongside sales is a small habit that prevents a large and familiar problem, and the cash flow scenario builder from CSVs makes that habit automatic rather than something you have to remember to do. It also changes how a good month feels. Instead of treating a big sales week as free money to spend, you see the reserve tick up and understand that part of that cash was always owed elsewhere. That clarity is worth having before the money is committed, not after. Owners who set aside as they go rarely face the ugly surprise of a tax bill with no funds behind it, and that calm is most of the value here.
Is my bank and financial data safe if I never connect a live account?
This is the design question the product was built around, and the answer starts with what it does not do. It does not ask for your online banking login. It does not connect a permanent feed that watches your account. It works from CSV files you export yourself and choose to import. That means the sensitive material, your real bank activity and payroll, stays in files you control rather than being copied into a service that holds a live key to your money. For an owner who has grown uneasy about how many tools want a direct line into their bank, that difference is the entire appeal.
Keeping the work local also lines up with plain, official advice on handling private information. The U.S. Federal Trade Commission tells businesses to hold onto only the data they need and to lock down what they keep, principles it lays out in its guide to protecting personal information. A tool that runs on your own files, on your own machine, gives you fewer copies of your financial data floating around and a clearer sense of where everything sits. You cannot lose control of a connection you never made.
It is worth being honest about the trade. Running on exports means you refresh the picture by importing new files rather than having it update itself in the background. That is a small manual step. In exchange, you never hand a third party standing access to your accounts, and your numbers are not sitting on someone else’s server waiting to be the target of a breach. For the buyer this is aimed at, a privacy-minded operator, that trade is an easy one to accept. Convenience that costs you control over your bank data is not much of a bargain.
The forecasting itself does not need a live link to be useful. A CSV of last month’s activity plus your open invoices and payroll is enough to project the weeks ahead. So the cash flow scenario builder from CSVs gives up nothing important by staying offline-friendly. You still get the gap warnings, the receivables risk flags, and the tax reserve estimate. You simply get them from files you fed in rather than from a pipe into your account. If you want the specifics of what the tool reads and what it keeps, the product page lays it out. The plain summary is that the cash flow scenario builder from CSVs is meant to reduce your exposure, not add to it. Your data comes in as files you own, the analysis happens close to you, and nothing about the tool requires you to trust a stranger with the keys to your bank. For owners who have watched one too many services ask for full account access, that is a reassuring place to start. It is also worth remembering that a live connection is a standing risk, not a one-time one. Every day a tool holds a key to your account is another day that key could be misused or stolen. A tool that never asks for the key removes that whole category of worry. You decide when the data moves, and it only moves as the files you hand over, nothing more and nothing running quietly in the background.
How is this different from Float, Fathom, or QuickBooks?
Float, Fathom, and QuickBooks are capable tools, but they are built on a different assumption than this one. They generally want to sit on top of a connected accounting system, syncing live with your books or your bank to produce their reports. That is fine if you already run everything through one cloud ledger and are happy to keep feeding it. Many small operators are not in that position. They have bank exports, a spreadsheet of invoices, and a payroll file, and they want a forecast without adopting or connecting a whole platform first. The cash flow scenario builder from CSVs is built for exactly that person.
The first difference is the input. The incumbents lean on integrations and live sync. This tool leans on CSV files you already have. There is no account to link, no ongoing connection to maintain, and no requirement that your books live in a particular system. If you can export to CSV, and nearly everything can, you can build a forecast. That lowers the barrier from a setup project to a single import.
The second difference is where your data lives. Cloud-connected tools hold your financial information on their servers by design. This one keeps the work on your own files and machine. That posture matters more than it used to, because businesses handling customer and financial data carry real security expectations, a point the U.S. Federal Trade Commission underlines in its overview of the Safeguards Rule. Fewer live connections and fewer copies on outside servers is a simpler risk to manage for an owner without an IT team.
The third difference is scope and price. The big platforms bundle forecasting into a wider suite you pay for month after month. This is a focused tool with a one-time purchase and an optional low-cost tier if you want ongoing updates, and it does one job well rather than trying to be your whole finance stack. It does not replace your bookkeeping. It answers the specific question of where your cash is headed and what could go wrong. If you already love QuickBooks for the books, you can still use this for the forward look without switching anything. For an operator weighing tools, the point is not that the incumbents are bad. It is that they are built for a connected, subscription-first workflow, and the cash flow scenario builder from CSVs is built for someone who wants a private forecast from files they already own. The operator industry page shows where it fits among the other tools made for owners, and the theme across all of them is the same, do the useful thing without demanding a migration first. There is also a cost angle worth naming. The subscription suites keep charging whether or not you open them in a given month, and forecasting is something many owners do in bursts around a big decision or a slow season. Paying once for a tool you reach for when you need it, rather than every month by default, fits that rhythm better. You are not renting a platform. You are buying a forecast you can run whenever the question comes up, on data you already keep.
Can it use payroll CSVs to forecast around labor costs?
Yes. Payroll is often the largest and least flexible outflow a small business has, so leaving it out of a forecast would make the whole picture unreliable. The tool imports payroll CSVs alongside your bank and invoice files and folds those labor costs into the cash flow scenarios. That means when the forecast shows a tight week, it is accounting for the fact that wages have to be paid on schedule regardless of what customers do. Seeing payroll and receivables on the same timeline is what makes a gap warning trustworthy instead of theoretical.
Working from payroll files also nudges you toward the records you are supposed to keep anyway. Employers are expected to preserve payroll records for a set number of years, a requirement the U.S. Department of Labor spells out in its fact sheet on recordkeeping under the FLSA. When your payroll data is already exported to CSV and imported into the tool, you have an organized copy of those figures on hand, not just buried in a payroll app you log into twice a month. The forecasting use and the recordkeeping need pull in the same direction.
The practical value shows up when labor costs and income do not line up in time. Say payroll runs every two weeks but a large customer pays on net-thirty terms. On paper you are profitable, but there are stretches where the wages are due before the invoice clears. The cash flow scenario builder from CSVs makes those stretches visible in advance, so you can arrange for them calmly rather than discovering the squeeze on payday. You might hold a little more in reserve, chase a slow invoice sooner, or time a discretionary purchase for after the crunch.
You can also test labor decisions before making them. If you are weighing a new hire or extra seasonal hours, you can add that cost to the scenario and watch how it changes the weeks ahead. Does the business still cover its gaps, or does a thin month turn into a shortfall. Having that answer before you commit is worth a great deal to an owner, because payroll commitments are hard to walk back once made. The tool does not decide for you. It shows you the consequence so you decide with your eyes open. This is the kind of everyday planning the product page was built to support. By treating payroll as a first-class input rather than an afterthought, the cash flow scenario builder from CSVs gives you a forecast that reflects the real, rigid cost of running a team, which is exactly the cost most likely to catch an owner off guard. The wider point is that a forecast is only as good as the outflows it includes. Leave out payroll and every gap warning is wrong by the size of your labor bill, which for most small businesses is the biggest line of all. Fold it in and the picture finally matches the account. That is why the tool treats your payroll export as a required part of the story rather than an optional extra you can skip. Getting the hard costs right is what separates a forecast you can act on from a hopeful sketch.
| Attributes | Value |
|---|---|
| Deployment |
On-Premises |
| Platform |
Windows |
| License Type |
Perpetual |
| Billing Period |
One-Time |
| Target Customer |
Small Business & Retail |
| Free Trial |
No |
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