Compliance Calendar: 12 Proven Dates to Avoid Mistakes

A compliance calendar is the one tool that keeps a small business ahead of its filing deadlines instead of chasing them. For an owner in Madison, Mississippi who already carries payroll, invoices, and staffing, a compliance calendar turns a scattered pile of due dates into a plan you can rely on. At Ledger Group Services, we keep a compliance calendar for every client we support, because a missed deadline almost always costs more than the few minutes it takes to record the date in the first place. This guide walks through the twelve dates that belong on your calendar for the year ahead, why each one matters, and how to keep any of them from slipping past you.

Table of Contents

1. What a Compliance Calendar Actually Does
2. The Monthly Dates: Payroll Tax Deposits
3. The Quarterly Dates: Form 941 and Estimated Taxes
4. Your Mississippi Annual Report Deadline
5. The January Rush: W-2, 1099, and Form 940
6. Compliance Documentation That Belongs on the Calendar
7. How to Build a Compliance Calendar You Will Actually Use
8. When to Hand Your Compliance Calendar to a Back-Office Team
9. Frequently Asked Questions

What a Compliance Calendar Actually Does

A compliance calendar is a running schedule of every legal and financial obligation your business owes to a government agency, along with the internal tasks that support those filings. It is not a wall planner covered in sticky notes. A well built compliance calendar lists the form, the agency, the exact due date, the person responsible, and the records needed to complete each item.

Most owners we meet in the Jackson metro do not miss deadlines because they are careless. They miss them because the dates live in too many places: a payroll portal here, an email from the accountant there, a letter from the Secretary of State in a drawer. A single schedule pulls all of it into one view. When every obligation sits in one place, you stop reacting to notices and start working from a plan.

The obligations on a small business calendar usually fall into four groups: payroll and employment taxes, income and estimated taxes, state entity filings such as the annual report, and internal recordkeeping. We handle these areas every day through our bookkeeping, payroll, and HR services, so the sections below follow the same order we use when we set up a compliance calendar for a new client.

The Monthly Dates: Payroll Tax Deposits

Payroll is where the calendar earns its keep, because the deadlines repeat every month and the penalties for missing them add up quickly. If you have employees, you owe federal employment taxes on a schedule the IRS assigns you: monthly or semiweekly. Monthly depositors send withheld income tax and both shares of Social Security and Medicare by the fifteenth day of the following month. Semiweekly depositors follow a faster rhythm tied to their paydays. The IRS explains both schedules and the next day rule for larger liabilities in its guide to employment tax due dates.

Your compliance calendar should carry the deposit date that matches your assigned schedule, not a guess. Mark it for every month, and mark it a few days early so a bank holiday never turns an on time payment into a late one. Mississippi state withholding runs on its own schedule through the Department of Revenue, so add that date beside the federal one.

Owners who run payroll themselves often tell us the monthly deposit is the item most likely to slip during a busy season. Putting it on a compliance calendar, with a reminder that fires before the due date rather than on it, is the simplest fix we know.

Two details trip up new employers. First, whether you deposit monthly or semiweekly is set by a lookback period, not by choice, and most new employers begin on the monthly schedule until the IRS tells them otherwise. Second, a deposit counts as made when the funds actually reach the Treasury, not when you start the transfer, so a late click can still be a late deposit. Note both facts next to the date so the rule is never a surprise.

The Quarterly Dates: Form 941 and Estimated Taxes

Four times a year, employers file Form 941 to report the wages paid and the taxes withheld for the quarter. The return is due by the last day of the month that follows the end of each quarter, which puts the deadlines at the end of April, July, October, and January. If every deposit was made on time, the IRS allows a short grace period into the following days, but the safe habit is to treat the last day of the month as firm.

Estimated income tax belongs on the same page of your calendar. Owners of pass through entities, and anyone whose tax is not fully covered by withholding, generally pay estimated tax in four installments across the year. Missing an installment does not just create a balance; it can trigger an underpayment penalty even when the full amount is paid later.

A compliance calendar keeps these quarterly items from colliding with your monthly payroll dates. When you can see April, July, October, and January laid out in advance, you can set aside the cash and the paperwork before the week the return is due, rather than scrambling on the final afternoon. Every quarterly filing that lands on the compliance calendar is one less surprise in a season that already brings enough of them.

Estimated tax has its own rhythm across the year, with installments due in the middle of April, June, and September and again in the middle of the following January. Line those four dates up beside the Form 941 deadlines and you can see the full tax picture in one glance, which makes it far easier to set aside the right amount before each payment is owed.

Your Mississippi Annual Report Deadline

Every corporation and limited liability company registered in Mississippi files an annual report with the Secretary of State. For profit corporations and LLCs can file on or after January 1 and are due by April 15 each year. Nonprofit corporations file by May 15. The report is submitted online, and the state uses it to keep your entity in good standing.

This is the deadline owners forget most often, because it comes only once a year and no vendor sends an invoice for it. The consequence is serious. A business that fails to file can be administratively dissolved, which means it loses the legal protections of its corporate or LLC structure until it is reinstated. The Mississippi Secretary of State outlines the process and the good standing requirement on its annual reports pages.

Your registered agent is the point of contact the state uses for these notices, so the annual report and your registered agent details belong side by side on the compliance calendar. If your agent address is out of date, the reminder never reaches you. We keep both on one line for every entity we serve, so the April date and the agent information are reviewed together.

It helps to understand what a registered agent actually does. The agent is the person or firm authorized to receive legal service of process and official state mail for your entity, at a physical Mississippi address during business hours. If that agent moves, retires, or changes contact details, you file the update with the Secretary of State so the state can always reach you. A missed notice does not pause a deadline, which is why the agent line sits at the top of the schedule.

The January Rush: W-2, 1099, and Form 940

January is the busiest month on any small business compliance calendar, and the last day of the month carries the most weight. By January 31, employers must furnish Form W-2 to every employee and file copies with the Social Security Administration. The same date applies to Form 1099-NEC for the independent contractors you paid during the year, along with the transmittal that accompanies it.

Form 940, the annual federal unemployment tax return, is also due at the end of January, with a short extension when the tax was deposited on time. Add your Mississippi year end wage reporting to the same week, and you can see why owners who wait until January to gather names, addresses, and totals find themselves under real pressure.

The way to survive the January rush is to prepare for it in December. A compliance calendar that flags the January 31 cluster in advance gives you six weeks to confirm contractor details, verify employee addresses, and reconcile the year before the forms are due. The work does not get smaller, but it stops arriving all at once.

Preparation in December is mostly verification. Confirm that every contractor who crossed the reporting threshold has a completed Form W-9 on file, that employee names and addresses match your payroll records, and that any address changes from the year are captured. Gathering those details while the year is fresh turns the January filing into a review rather than a scramble, and it lowers the chance of a corrected form later.

Compliance Documentation That Belongs on the Calendar

Not every obligation on the calendar is a government form. A great deal of compliance is documentation: the records you keep so that when a question comes, the answer is already on file. The Small Business Administration groups these internal requirements alongside external filings in its guidance on staying legally compliant, and for good reason. Licenses and permits expire. Insurance renews. Corporate minutes, HR files, and employee eligibility records all have their own review dates.

A compliance calendar should carry the renewal date for every license and permit your business holds, the review date for your employee handbook and policies, and a standing reminder to confirm that payroll, tax, and bank records are filed where an auditor could find them. Record retention rules mean many of these documents must be kept for years, so the calendar is also where you note what can be archived and what must stay within reach.

This is the quiet half of compliance, and it is the half that protects you if the business is ever sold, audited, or challenged. Building these review dates into the same compliance calendar as your tax deadlines means nothing depends on someone remembering it at the right moment.

Retention timelines belong on the same schedule. The IRS asks employers to keep employment tax records for at least four years, and many business and property records are kept longer to support depreciation and the eventual sale of the company. Rather than guess each spring, note the earliest safe purge date beside each box or folder of records. That way you keep what protects you, clear what does not, and never shred a document you still needed.

How to Build a Compliance Calendar You Will Actually Use

A calendar only helps if you keep it current, so the goal is a system simple enough to maintain. Start by listing every obligation from the sections above that applies to your business, then add the exact date, the responsible person, and the records each item needs. Work through your payroll, tax, and entity duties in one sitting so nothing is left off.

Give every entry a reminder that fires several days early, not on the due date itself. A deadline you learn about on the morning it is due is not really on a calendar; it is a fire drill. Build in a buffer so that a sick day or a bank holiday cannot turn a comfortable filing into a late one.

Review the compliance calendar at the start of each month. Look at what is coming in the next thirty days, confirm the records are ready, and clear anything small before it grows. Once a year, usually after the January rush settles, rebuild it for the year ahead so new licenses, new hires, and new obligations are captured while they are fresh.

Keep the calendar in one place that more than one person can reach. If the only copy lives with one busy owner, the business is one hectic week away from a missed deadline. A shared compliance calendar is a safeguard, not a formality.

A short monthly habit keeps the whole system honest. Set aside fifteen minutes at the start of each month to look at the next thirty days, confirm the money and the records are ready, and check that responsibilities have not shifted with a new hire or a departure. The review is quick because the schedule already did the remembering. You are really just catching the one date that moved before it becomes a missed filing.

When to Hand Your Compliance Calendar to a Back-Office Team

Many owners can build a compliance calendar. Fewer have the hours to work it every week while running the business the calendar is meant to protect. That is the point where handing the schedule to a back office team makes sense.

At Ledger Group Services, we maintain the compliance calendar as part of the bookkeeping, payroll, and administrative work we handle for the businesses and families we serve across the Jackson metro. We track the deposit dates, prepare the quarterly and annual filings, watch the April annual report deadline, and keep your documentation audit ready, so the dates never depend on a single busy person remembering them. Our promise is a simple one: professional, confidential, and reliable support that handles what matters with care.

If your deadlines currently live in several places, or if last year included a filing you would rather not repeat, a single owner of the calendar changes the picture. You keep the final say on every decision. We keep the schedule, the records, and the reminders running underneath it.

Frequently Asked Questions

What should be on a small business compliance calendar?

A small business compliance calendar should list your payroll tax deposits, quarterly Form 941 filings, estimated taxes, the annual report, year end W-2 and 1099 forms, and every license, permit, and record with a renewal or review date. Owners who run their own payroll can start from our guide to small business payroll and add each date from there.

When is the Mississippi annual report due?

The Mississippi annual report is due by April 15 for for profit corporations and LLCs, and by May 15 for nonprofits. Because the state contacts your entity through its registered agent, keep both on one line of your calendar; our overview of a registered agent in Mississippi explains why that address has to stay current.

How do I avoid payroll tax penalties?

You avoid payroll tax penalties by depositing withheld taxes on the schedule the IRS assigns you and filing Form 941 by the last day of the month after each quarter. The mechanics are laid out in our article on payroll tax basics for a small employer.

What records do I need to stay audit ready?

To stay audit ready you need organized payroll, tax, bank, and entity records that a reviewer could follow without your help. Our guide to audit ready financial records walks through what to keep and for how long.

Can I outsource compliance without losing control?

Yes, you can outsource the day to day work of tracking and filing while keeping every decision in your hands, which is how we structure our HR administration for small businesses and back office support. You approve, we execute, and the compliance calendar keeps running.

Related Guides

• What does a registered agent do?

Bring Order to Your Deadlines With Ledger Group Services

A clear compliance calendar is the difference between a year you plan and a year that surprises you. If you would like a single, reliable schedule for every payroll, tax, and filing deadline your business faces, request a consultation and we will help you put one in place. Every filing handled with care, so you can focus on the work only you can do.